Ref# | Year designated | Name | Image | Built | Location Coordinates | Region/state | Country | Category |
---|
1 | 1966 | Bollman Truss Bridge | | 1869 | Savage
| Maryland | United States | bridges |
2 | 1967 | Bidwell Bar Bridge | | 1856 | Oroville
| California | United States | bridges |
3 | 1967 | Erie Canal | | 1825 | Hudson River to Lake Erie
| New York | United States | water transportation |
4 | 1967 | Middlesex Canal | | 1803 | Middlesex County
| Massachusetts | United States | water transportation |
5 | 1968 | Central Pacific Railroad | | 1863–1869 | Sacramento eastward
| California | United States | roads & rails |
6 | 1968 | Durango-Silverton Branch of the D&RGW RR | | 1882 | Durango
| Colorado | United States | roads & rails |
7 | 1968 | Ellicott's Stone | | 1799 | Mobile
| Alabama | United States | surveys & maps |
8 | 1968 | Acequias of San Antonio | | 1718 | San Antonio
| Texas | United States | water supply & control |
9 | 1968 | Joining of the Rails - Transcontinental Railroad | | 1869 | Promontory
| Utah | United States | roads & rails |
10 | 1968 | Wheeling Suspension Bridge | | 1849 | Wheeling
| West Virginia | United States | bridges |
11 | 1969 | Alvord Lake Bridge | | 1889 | San Francisco
| California | United States | bridges |
12 | 1969 | Charleston - Hamburg Railroad | | 1833 | Charleston to Hamburg
| South Carolina | United States | roads & rails |
13 | 1970 | Ascutney Mill Dam | | 1834 | Windsor
| Vermont | United States | dams |
14 | 1970 | Bridgeport Covered Bridge | | 1862 | Nevada County
| California | United States | bridges |
15 | 1970 | Cornish–Windsor Covered Bridge | | 1866, rebuilt 1988 | Windsor to Cornish
| Vermont and New Hampshire | United States | bridges |
16 | 1970 | Frankford Avenue Bridge | | 1697 | Philadelphia
| Pennsylvania | United States | bridges |
17 | 1970 | Potowmack Canal and Locks | | 1799 | Great Falls
| Virginia | United States | water transportation |
18 | 1970 | Theodore Roosevelt Dam & Salt River Project | | 1911 | | Arizona | United States | water supply & control |
19 | 1970 | Union Canal Tunnel | | 1828 | Lebanon
| Pennsylvania | United States | water transportation |
20 | 1971 | Bethlehem Waterworks | | 1761 | Bethlehem
| Pennsylvania | United States | water supply & control |
21 | 1971 | Druid Lake Dam | | 1871 | Baltimore
| Maryland | United States | dams |
22 | 1971 | Eads Bridge | | 1874 | St. Louis
| Missouri | United States | bridges |
23 | 1971 | First Owens River - Los Angeles Aqueduct | | 1913 | Owens Valley
| California | United States | water supply & control |
24 | 1971 | Mormon Tabernacle | | 1867 | Salt Lake City
| Utah | United States | buildings |
25 | 1972 | Cabin John Aqueduct | | 1863 | Cabin John
| Maryland | United States | water supply & control |
26 | 1972 | Chesbroughs Water Supply System Chicago | | 1869 | Chicago
| Illinois | United States | water supply & control |
27 | 1972 | Brooklyn Bridge | | 1883 | New York City
| New York | United States | bridges |
28 | 1972 | Gunnison Tunnel | | 1909 | Montrose
| Colorado | United States | tunnels |
29 | 1972 | Roebling's Delaware Aqueduct of the Delaware & Hudson Canal | | 1848, restored 1983 | Lackawaxen to Minisink Ford
| Pennsylvania & New York | United States | water transportation |
30 | 1972 | Miami Conservancy District | | 1922 | near Dayton
| Ohio | United States | water supply & control |
31 | 1973 | Buffalo Bill Dam | | 1910 | Cody
| Wyoming | United States | dams |
32 | 1973 | Cheesman Reservoir | | 1905 | Southwest of Denver
| Colorado | United States | dams |
33 | 1973 | Embudo Stream Gauging Station | | 1889 | Embudo
| New Mexico | United States | water supply & control |
34 | 1973 | Ingalls Building | | 1903 | Cincinnati
| Ohio | United States | buildings |
35 | 1973 | Pelton Impulse Water Wheel | | 1878 | Camptonville
| California | United States | power generation |
36 | 1973 | Starrucca Viaduct | | 1848 | Lanesboro
| Pennsylvania | United States | bridges |
37 | 1974 | Kansas City Park and Boulevard System | | 1893 to 1915 | Kansas City
| Missouri | United States | surveys & maps |
38 | 1974 | Milwaukee Metropolitan Sewage Treatment Plant, home of Milorganite[5] | | 1919 | Milwaukee
| Wisconsin | United States | water supply & control |
39 | 1974 | Philadelphia Municipal Water Supply | | 1801 | Philadelphia
| Pennsylvania | United States | water supply & control |
40 | 1974 | Stone Arch Bridge | | 1883 | Minneapolis
| Minnesota | United States | bridges |
41 | 1975 | Castillo de San Marcos | | 1695 | St. Augustine
| Florida | United States | buildings |
42 | 1975 | Croton Water Supply System | | 1842 | New York City
| New York | United States | water supply & control |
43 | 1975 | Folsom Hydroelectric Power System | | 1895 | Folsom
| California | United States | power generation |
44 | 1975 | Granite Railway | | 1826 | Quincy
| Massachusetts | United States | roads & rails |
45 | 1975 | Hoosac Tunnel | | 1875 | Berkshire County
| Massachusetts | United States | tunnels |
46 | 1975 | Lawrence Experiment Station | | 1886 | Lawrence
| Massachusetts | United States | research & educational |
47 | 1975 | Marlette Lake Water System | | 1873 to 1887 | Virginia City
| Nevada | United States | water supply & control |
48 | 1975 | Mount Washington Cog Railway | | 1869 | Mount Washington
| New Hampshire | United States | roads & rails |
49 | 1975 | Smithfield Street Bridge | | 1883 | Pittsburgh
| Pennsylvania | United States | bridges |
50 | 1975 | Tunkhannock Viaduct | | 1915 | Nicholson
| Pennsylvania | United States | bridges |
51 | 1976 | Crozet's Blue Ridge Tunnel | | 1858 | Waynesboro
| Virginia | United States | tunnels |
52 | 1976 | Cumbres and Toltec Scenic Railroad | | 1880 | Chama to Antonito
| New Mexico and Colorado | United States | roads & rails |
53 | 1976 | Elephant Butte Dam | | 1916 | Truth or Consequences
| New Mexico | United States | dams |
54 | 1976 | First Concrete Pavement | | 1893 | Bellefontaine
| Ohio | United States | roads & rails |
55 | 1976 | International Boundary Marker No. 1[6] | | 1855 | Doña Ana County
| New Mexico | United States | surveys & maps |
56 | 1976 | King's Road | | 1766 to 1775 | New Smyrna
| Florida | United States | roads & rails |
57 | 1976 | National Road | | 1811–1839 | Cumberland to Vandalia
| Maryland to Illinois | United States | roads & rails |
58 | 1977 | Charlestown Naval Dry Dock | | 1833 | Boston
| Massachusetts | United States | water transportation |
59 | 1977 | City Plan of Savannah | | 1733 | Savannah
| Georgia | United States | surveys & maps |
60 | 1977 | Great Falls Raceway and Power System | | 1800 | Paterson
| New Jersey | United States | power generation |
61 | 1977 | First New York Subway | | 1904 | New York City
| New York | United States | roads & rails |
62 | 1977 | Mason–Dixon line | | 1767 | | Maryland & Pennsylvania | United States | surveys & maps |
63 | 1977 | Minot's Ledge Lighthouse | | 1860 | off Scituate
| Massachusetts | United States | water transportation |
64 | 1977 | Mullan Road | | 1862 | Walla Walla
| Washington | United States | roads & rails |
65 | 1977 | Dry Dock No 1 Norfolk Naval Shipyard | | 1833 | Portsmouth
| Virginia | United States | water transportation |
66 | 1977 | Reversal of the Chicago River | | 1900 | Chicago
| Illinois | United States | water transportation |
67 | 1977 | Vulcan Street Plant | | 1882 | Appleton
| Wisconsin | United States | power generation |
68 | 1977 | William E. Ward House | | 1876 | Rye Brook
| New York | United States | buildings |
69 | 1978 | Boston Subway | | 1897 | Boston
| Massachusetts | United States | roads & rails |
70 | 1978 | Dunlap's Creek Bridge | | 1839 | Brownsville
| Pennsylvania | United States | bridges |
71 | 1978 | Hudson and Manhattan Railroad Tunnel | | 1908 | Jersey City to New York City
| New Jersey & New York | United States | tunnels |
72 | 1978 | Newark International Airport | | 1928 | Newark
| New Jersey | United States | aviation |
73 | 1978 | United States Military Academy | | 1813 | West Point
| New York | United States | research & educational |
74 | 1979 | Cleveland Hopkins Airport | | 1925 | Cleveland
| Ohio | United States | aviation |
75 | 1979 | Fink Deck Truss Bridge | | 1870 | Lynchburg
| Virginia | United States | bridges |
76 | 1979 | Fink Through Truss Bridge | | 1858 | Hamden
| New Jersey | United States | bridges |
77 | 1979 | Iron Bridge | | 1779 | Ironbridge
| West Midlands | England | bridges |
78 | 1979 | Moffat Tunnel | | 1928 | Winter Park
| Colorado | United States | tunnels |
79 | 1979 | Rockville Bridge | | 1902 | Harrisburg
| Pennsylvania | United States | bridges |
80 | 1980 | Goodyear Airdock | | 1929 | Akron
| Ohio | United States | aviation |
81 | 1980 | Hydraulic-Inclined Plane System of the Morris Canal | | 1831 | Waterloo Village
| New Jersey | United States | water transportation |
82 | 1981 | Borden Base Line | | 1831 | Hatfield
| Massachusetts | United States | surveys & maps |
83 | 1981 | Chain of Rocks Water Purification Plant | | 1904 | St. Louis
| Missouri | United States | water supply & control |
84 | 1981 | Charles River Basin Project | | 1910 | Boston
| Massachusetts | United States | water supply & control |
85 | 1981 | Cortland Street Drawbridge | | 1902 | Chicago
| Illinois | United States | bridges |
86 | 1981 | George Washington Bridge | | 1931 | Fort Lee to New York City
| New Jersey & New York | United States | bridges |
87 | 1981 | Louisville Water Works | | 1875 to 1896 | Louisville
| Kentucky | United States | water supply & control |
88 | 1981 | Montgomery Bell's Tunnel | | 1818 | Cheatham County
| Tennessee | United States | tunnels |
89 | 1981 | Snoqualmie Falls Cavity Generating Station | | 1899 | Snoqualmie
| Washington | United States | power generation |
90 | 1981 | Union Station | | 1894 | St. Louis
| Missouri | United States | roads & rails |
91 | 1981 | Washington Monument | | 1885 | Washington
| District of Columbia | United States | buildings |
92 | 1981 | Schenectady Whipple Truss Bridge | Whipple Truss Bridge | | 1855 | Schenectady
| New York | United States | bridges |
93 | 1982 | Carrollton Viaduct | | 1829 | Baltimore
| Maryland | United States | bridges |
94 | 1982 | Detroit-Windsor Tunnel | | 1930 | Detroit
| Michigan | United States | tunnels |
95 | 1982 | Eads South Pass Navigation Works | | 1879 | Port Eads
| Louisiana | United States | water transportation |
96 | 1982 | Holland Tunnel | | 1927 | Jersey City to New York City
| New Jersey & New York | United States | tunnels |
97 | 1982 | John A. Roebling Suspension Bridge | | 1866 | Cincinnati
| Ohio | United States | bridges |
98 | 1982 | Kinzua Railway Viaduct | | 1882 | McKean County
| Pennsylvania | United States | bridges |
99 | 1982 | Rogue River Bridge | | 1931 | Gold Beach
| Oregon | United States | bridges |
100 | 1982 | Second Street Bridge | | 1886 | Allegan
| Michigan | United States | bridges |
101 | 1982 | Watertown Arsenal | | 1859 | Watertown
| Massachusetts | United States | research & educational |
102 | 1983 | Atlantic City Convention Hall | | 1929 | Atlantic City
| New Jersey | United States | buildings |
103 | 1983 | Bailey Island Bridge | | 1928 | Harpswell
| Maine | United States | bridges |
104 | 1983 | Blenheim Bridge | | 1855 | North Blenheim
| New York | United States | bridges |
105 | 1983 | Iron Building of the U.S. Army Arsenal | | 1859 | Watervliet
| New York | United States | buildings |
106 | 1983 | Ohio Canal System | | 1848 | Akron
| Ohio | United States | water transportation |
107 | 1983 | Peavey–Haglin Experimental Concrete Grain Elevator | | 1900 | St. Louis Park
| Minnesota | United States | buildings |
108 | 1983 | Sault Ste. Marie Hydroelectric Complex | | 1902 | Sault Ste. Marie
| Michigan | United States | power generation |
109 | 1983 | Zuiderzee Enclosure Dam | | 1927 to 1932 | Zaandam
| North Holland | Netherlands | water supply & control |
110 | 1984 | Columbia River Scenic Highway | | 1922 | Portland
| Oregon | United States | roads & rails |
111 | 1984 | Columbia-Wrightsville Bridge | | 1930 | Columbia
| Pennsylvania | United States | bridges |
112 | 1984 | Golden Gate Bridge | | 1937 | San Francisco
| California | United States | bridges |
113 | 1984 | Hoover Dam | | 1935 | Boulder City
| Nevada & Arizona | United States | dams |
114 | 1984 | Lowell Waterpower System | | 1821 | Lowell
| Massachusetts | United States | power generation |
115 | 1984 | Panama Canal | | 1914 | Colón to Panama City | | Panama | water transportation |
116 | 1984 | Rocky River Pumped Storage Hydro-Plant | | 1925 | New Milford
| Connecticut | United States | power generation |
117 | 1985 | Bayonne Bridge | | 1931 | Bayonne to Staten Island
| New Jersey & New York | United States | bridges |
118 | 1985 | Beginning Point of the U.S. Public Land Survey | | 1785 | Liverpool
| Ohio | United States | surveys & maps |
119 | 1985 | Cape Cod Canal | | 1914 | Barnstable County
| Massachusetts | United States | water transportation |
120 | 1985 | Chesapeake and Delaware Canal | | 1828 (rebuilt 1927) | New Castle
| Delaware | United States | water transportation |
121 | 1985 | Davis Island Lock and Dam | | 1885 | Pittsburgh
| Pennsylvania | United States | water transportation |
122 | 1985 | Forth Railway Bridge | | 1890 | North Queensferry to South Queensferry
| | Scotland | bridges |
123 | 1985 | Going-to-the-Sun Road | | 1932 | Glacier National Park
| Montana | United States | roads & rails |
124 | 1985 | High Bridge | | 1877 | Jessamine & Mercer Counties
| Kentucky | United States | bridges |
125 | 1985 | Statue of Liberty | | 1886 | New York Harbor
| New York[7] | United States | buildings |
126 | 1986 | White River Concrete Arch Bridge | | 1930 | Cotter
| Arkansas | United States | bridges |
127 | 1986 | Cranetown Triangulation Site | | 1817 | Cedar Grove
| New Jersey | United States | surveys & maps |
128 | 1986 | Eiffel Tower | | 1889 | Paris
| Île-de-France | France | buildings |
129 | 1986 | El Camino Real | | 1598-1800s | Santa Fe and Mexico City
| New Mexico | United States and Mexico | roads & rails |
130 | 1986 | El Camino Real (The Royal Road) Eastern Branch | | from 16th century | San Antonio
| Texas | United States | roads & rails |
131 | 1986 | New Castle Ice Harbor | | 1974 | New Castle
| Delaware | United States | water transportation |
132 | 1986 | Norris Dam | | 1936 | Knoxville
| Tennessee | United States | dams |
133 | 1986 | San Francisco–Oakland Bay Bridge | | 1937 | San Francisco to Oakland
| California | United States | bridges |
134 | 1986 | Sewall's Bridge | | 1761 (rebuilt 1934) | York
| Maine | United States | bridges |
135 | 1986 | Triborough Bridge Project | | 1936 | New York City
| New York | United States | bridges |
136 | 1986 | U.S. Army Corps of Engineers Waterways Exp. Station | | 1929 | Vicksburg
| Mississippi | United States | research & educational |
137 | 1986 | U.S. Capitol | | 1793, rebuilt 1863 | Washington
| District of Columbia | United States | buildings |
138 | 1987 | Allegheny Portage Railroad | | 1834 | Hollidaysburg
| Pennsylvania | United States | roads & rails |
139 | 1987 | Bonneville Dam, Columbia River System | | 1937 | Bonneville
| Oregon | United States | power generation |
140 | 1987 | Bridges of Keeseville | | 1843, 1878, 1888 | Keeseville
| New York | United States | bridges |
141 | 1987 | Dismal Swamp Canal | | 1805 | Chesapeake to South Mills
| Virginia to North Carolina | United States | water transportation |
142 | 1987 | Houston Ship Channel | | 1837–present | Houston
| Texas | United States | water transportation |
143 | 1987 | Kamehameha V Post Office | | 1871 | Honolulu
| Hawaii | United States | buildings |
144 | 1987 | Frisco Bridge | | 1892 | Memphis
| Tennessee & Arkansas | United States | bridges |
145 | 1987 | Quebec Bridge | | 1917 | Quebec City
| Quebec | Canada | bridges |
146 | 1988 | Belle Fourche Dam | | 1911 | Belle Fourche
| South Dakota | United States | dams |
147 | 1988 | École Nationale des Ponts et Chaussées | | 1747 | Paris
| Île-de-France | France | research & educational |
148 | 1988 | Keokuk Hydro-Power System | | 1913 | Keokuk
| Iowa | United States | power generation |
149 | 1988 | Pennsylvania Turnpike | | 1940 | | Pennsylvania | United States | roads & rails |
150 | 1988 | River des Peres Sewerage & Drainage Works | | 1924 to 1931 | St. Louis
| Missouri | United States | water supply & control |
151 | 1988 | Sydney Harbour Bridge | | 1932 | Sydney
| New South Wales | Australia | bridges |
152 | 1989 | Royal Colonial Boundary of 1665 | | 1728–1819 | Middlesboro
| Kentucky | United States | surveys & maps |
153 | 1989 | Zhaozhou Bridge | | 605 AD | Zhaoxian
| Hebei | China | bridges |
154 | 1990 | Fort Peck Dam | | 1940 | Fort Peck
| Montana | United States | dams |
155 | 1990 | Maria Pia Bridge | | 1877 | Oporto
| Norte | Portugal | bridges |
156 | 1990 | Salginatobel Bridge | | 1930 | Grisons
| Graubünden | Switzerland | bridges |
157 | 1991 | Eddystone Lighthouse | | 1882 | off Plymouth
| | England | water transportation |
158 | 1991 | Fritz Engineering Laboratory | | 1910 | Bethlehem
| Pennsylvania | United States | research & educational |
159 | 1991 | St. Clair Tunnel | | 1891 | Port Huron
| Michigan | United States | tunnels |
160 | 1991 | Thames Tunnel | | 1843 | London
| | England | tunnels |
161 | 1992 | Acquedotto Traiano-Paolo | | 110 AD | Rome
| Lazio | Italy | water supply & control |
162 | 1992 | Niagara Falls Suspension Bridge | | 1849, 1855, 1883, 1898, 1941 | Niagara Gorge
| Ontario and New York | Canada and United States | bridges |
163 | 1992 | Duck Creek Aqueduct | | 1846 | Metamora
| Indiana | United States | water supply & control |
164 | 1992 | Hohokam Canal System | | 600 - 1450 AD | Maricopa County
| Arizona | United States | water supply & control |
165 | 1992 | San Jacinto Monument | | 1939 | Houston
| Texas | United States | buildings |
166 | 1993 | Blimp Hangars | | 1942 | Tustin
| California | United States | aviation |
167 | 1993 | Denison Dam | | 1943 | Denison
| Texas & Oklahoma | United States | dams |
168 | 1993 | Hanford B Reactor | | 1944 | Richland
| Washington | United States | power generation |
169 | 1993 | Stevens Pass Railroad Tunnels & Switchback System | | 1900 | Stevens Pass
| Washington | United States | tunnels |
170 | 1994 | Colorado River Aqueduct | | 1933–1941 | Blythe
| California | United States | water supply & control |
171 | 1994 | Kavanagh Building | | 1936 | Buenos Aires
| | Argentina | buildings |
172 | 1994 | Missouri River Bridges | | 1926 | Chamberlain
| South Dakota | United States | bridges |
173 | 1995 | Red Hill Underground Fuel Storage Facility | | 1943 | Honolulu
| Hawaii | United States | tunnels |
174 | 1994 | Viaducto del Malleco | | 1890 | Malleco River
| Central Chile | Chile | bridges |
175 | 1994 | White Pass and Yukon Route | | 1900 | Whitehorse, Yukon to Skagway, Alaska
| Yukon Territory to Alaska | Canada & United States | roads & rails |
176 | 1995 | Alaska Highway | | 1942 | Dawson Creek to Delta Junction
| British Columbia to Alaska | Canada & United States | roads & rails |
177 | 1995 | Banaue Rice Terraces | | data-sort-value="-10K+9900" | 100 BC | Banaue
| Ifugao | Philippines | water supply & control |
178 | 1995 | Acueducto de Queretaro | | 1738 | Querétaro
| | Mexico | water supply & control |
179 | 1995 | Victoria Falls Bridge | | 1905 | Zambezi River
| | Zimbabwe & Zambia | bridges |
180 | 1996 | Armour-Swift-Burlington Bridge | | 1912 | Kansas City
| Missouri | United States | bridges |
181 | 1996 | Dublin-Belfast railway line | | 1839 | Dublin to Belfast
| | Ireland & Northern Ireland | roads & rails |
182 | 1996 | Kentucky Dam | | 1944 | Gilbertsville
| Kentucky | United States | dams |
183 | 1996 | Lake Moeris Quarry Road | | data-sort-value="-10K+7425" | 2575-2137 BC | Lake Moeris
| | Egypt | roads & rails |
184 | 1996 | City Plan of Philadelphia | | 1682 | Philadelphia
| Pennsylvania | United States | surveys & maps |
185 | 1996 | San Antonio River Walk & Flood Control System | | 1929 to 1941 | San Antonio
| Texas | United States | water control & supply |
186 | 1997 | Grand Coulee Dam | | 1941 | Grand Coulee
| Washington | United States | dams |
187 | 1997 | Lake Washington Ship Canal & Hiram M. Chittenden Locks | | 1917 | Seattle
| Washington | United States | water transportation |
188 | 1997 | Navajo Bridge | | 1929 | Page
| Arizona | United States | bridges |
189 | 1997 | North Island Main Trunk Railway | | 1885–1908 | Auckland to Wellington
| North Island | New Zealand | roads & rails |
190 | 1997 | Northampton Street Bridge | | 1896 | Easton to Phillipsburg
| Pennsylvania & New Jersey | United States | bridges |
191 | 1997 | Snowy Mountains Scheme | | 1974 | Snowy Mountains
| New South Wales | Australia | power generation |
192 | 1997 | Texas Commerce Bank Building (formerly Gulf, now Chase) | | 1929 | Houston
| Texas | United States | buildings |
193 | 1997 | Walnut Street Bridge | | 1890 | Harrisburg
| Pennsylvania | United States | bridges |
194 | 1998 | Brooks AFB, Old Hangar 9 | | 1918 | San Antonio
| Texas | United States | aviation |
195 | 1998 | Canton Viaduct | | 1835 | Canton
| Massachusetts | United States | bridges |
196 | 1998 | Göta Canal | | 1810 to 1832 | Gothenburg
| Västra Götaland | Sweden | water transportation |
197 | 1998 | Moseley Wrought Iron Arch Bridge | | 1864 | North Andover
| Massachusetts | United States | bridges |
198 | 1998 | Tehachapi Pass Railroad Line | | 1876 | Kern County
| California | United States | roads & rails |
199 | 1999 | Acueducto de Segovia | | 50 AD | Segovia
| Castile and León | Spain | water supply & control |
200 | 1999 | Arroyo Seco Parkway | | 1940 | Los Angeles
| California | United States | roads & rails |
201 | 1999 | Blue Ridge Parkway | | begun 1935 | Shenandoah NP to Great Smokey Mountains NP
| Virginia to North Carolina | United States | roads & rails |
202 | 1999 | Cape Hatteras Lighthouse | | 1870 | Cape Hatteras
| North Carolina | United States | water transportation |
203 | 1999 | Maine Turnpike | | 1947 | | Maine | United States | roads & rails |
204 | 1999 | McNeill Street Pumping Station | | 1887 | Shreveport
| Louisiana | United States | water supply & control |
205 | 2000 | Cedar Falls Hydroelectric Project | | 1901 | Seattle
| Washington | United States | power generation |
206 | 2000 | Forth and Clyde Canal and Union Canal | | 1790 | | | Scotland | water transportation |
207 | 2000 | Hagia Sophia | | 537 AD | Istanbul
| Istanbul | Turkey | buildings |
208 | 2000 | Muskingum River Navigation System | | 1837 | Zanesville
| Ohio | United States | water transportation |
209 | 2000 | Seventh Street Improvement Arches | | 1909 | St. Paul
| Minnesota | United States | bridges |
210 | 2000 | West Baden Springs Hotel | | 1902 | West Baden Springs
| Indiana | United States | buildings |
211 | 2001 | Bunker Hill Covered Bridge | | 1895, rebuilt 1994 | Claremont
| North Carolina | United States | bridges |
212 | 2001 | Galveston Seawall and Grade Raising | | 1904 (expanded through 1963) | Galveston
| Texas | United States | water supply & control |
213 | 2001 | Baltimore & Ohio Roundhouse & Shop Complex | | 1842 to 1850s | Martinsburg
| West Virginia | United States | buildings |
214 | 2002 | Conwy Suspension Bridge | | 1826 | Conwy
| Conwy | Wales | bridges |
215 | 2002 | Conwy Tubular Bridge | | 1849 | Conwy
| Conwy | Wales | bridges |
216 | 2002 | Dorton Arena | | 1952 | Raleigh
| North Carolina | United States | buildings |
217 | 2002 | East Maui Irrigation System | | 1876 to 1923 | East Maui
| Hawaii | United States | water supply & control |
218 | 2002 | Five Stone Arch Bridges | | 1830 to 1866 | Hillsborough
| New Hampshire | United States | bridges |
219 | 2002 | Louisville and Portland Canal Locks & Dam | | 1830, rebuilt 1962 | Louisville
| Kentucky | United States | water transportation |
220 | 2002 | Marshall Building | | 1906 | Milwaukee
| Wisconsin | United States | buildings |
221 | 2002 | Menai Suspension Bridge | | 1826 | Anglesey
| | Wales | bridges |
222 | 2002 | Old Cape Henry Light, | | 1792, replaced 1881 | Virginia Beach
| Virginia | United States | water transportation |
223 | 2002 | Portland Head Light | | 1787 | Cape Elizabeth
| Maine | United States | water transportation |
224 | 2002 | Shannon Hydroelectric Scheme | | 1929 | | | Ireland | power generation |
225 | 2002 | Waldo-Hancock Suspension Bridge | | 1931 | Bucksport
| Maine | United States | bridges |
226 | 2003 | Horseshoe Curve | | 1854 | Altoona
| Pennsylvania | United States | roads & rails |
227 | 2003 | Suez Canal | | 1869 | Port Said to Suez
| | Egypt | water transportation |
228 | 2003 | Tennessee State Capitol | | 1845 to 1877 | Nashville
| Tennessee | United States | buildings |
229 | 2004 | Hwaseong Fortress | | 1796 | Suwon
| Gyeonggi-do | Republic of Korea | buildings |
230 | 2004 | Mesa Verde Reservoirs | | 750 to 1180 AD | Montezuma County
| Colorado | United States | water supply & control |
231 | 2004 | Northern Pacific High Line Bridge No 64 | | 1908 | Valley City
| North Dakota | United States | bridges |
232 | 2004 | Old Wisla Bridge | | | Tczew
| Vistula River | Poland | bridges |
233 | 2005 | Great Western Railway | | 1838 | | | England & Wales | roads & rails |
234 | 2005 | Philadelphia City Hall | | 1901 | Philadelphia
| Pennsylvania | United States | buildings |
235 | 2005 | Sweetwater Dam | | 1888 | Spring Valley
| California | United States | dams |
236 | 2005 | Stanley Hydraulics Laboratory at the University of Iowa | | established 1919 | Iowa City
| Iowa | United States | research & educational |
237 | 2006 | Machu Picchu | | 1460 AD | | | Peru | urban development |
238 | 2006 | Portland Observatory | | 1807 | Portland
| Maine | United States | water transportation |
239 | 2006 | Tipon | | 1200 - 1534 AD | | | Peru | water supply & control |
240 | 2007 | Caledonian Canal | | 1822 | Great Glen
| | Scotland | water transportation |
241 | 2007 | Craigellachie Bridge Moray | | 1814 | Strathspey
| | Scotland | bridges |
242 | 2008 | Choate Bridge | | 1764 | Ipswich
| Massachusetts | United States | bridges |
243 | 2008 | Goldfields Water Supply | | 1903 | Kalgoorlie
| Western Australia | Australia | water supply & control |
244 | 2008 | Lacey V. Murrow Bridge and Mount Baker Ridge Tunnels | | 1940 | King County
| Washington | United States | bridges |
245 | 2008 | Woodhead Dam | | 1897 | Cape Town
| Western Cape | South Africa | dams |
246 | 2009 | Guayabo Ceremonial Center | | data-sort-value="-10K+9700" | 300 BC - AD 1400 | Turrialba
| Turrialba | Costa Rica | civil engineering profession |
247 | 2009 | Vancouver's Mapping of the West Coast of North America | | 1791–1795 | | | Canada, Mexico and United States | surveys & maps |
248 | 2009 | Poughkeepsie-Highland Bridge | | 1886–1888 | Poughkeepsie
| New York | United States | bridges |
249 | 2009 | Manhattan Bridge | | 1909 | New York City
| New York | United States | bridges |
250 | 2009 | Queensboro Bridge | | 1909 | New York City
| New York | United States | bridges |
251 | 2009 | Williamsburg Bridge | | 1903 | New York City
| New York | United States | bridges |
252 | 2010 | Mackinac Bridge | | 1958 | Straits of Mackinac
| Michigan | United States | bridges |
253 | 2010 | Rensselaer Polytechnic Institute | | 1824 | Troy
| New York | United States | research & educational |
254 | 2010 | Thomas Viaduct Railroad Bridge[8] | | 1835 | Elkridge and Relay
| Maryland | United States | bridges |
255 | 2011 | Utica Memorial Auditorium | | 1959 | Utica
| New York | United States | buildings |
256 | 2011 | Tacoma Narrows Bridges[9] | | 1940-1950 | Tacoma
| Washington | United States | bridges |
257 | 2011 | Flight of Five Locks | | 1915 | Waterford
| New York | United States | water transportation |
258 | 2011 | Petra | | data-sort-value="-10K+9691" | 309 BC | | Ma'an Governorate | Jordan | buildings |
259 | 2012 | Zion-Mount Carmel Tunnel and Highway | | 1930 | Zion National Park
| Utah | United States | roads & rails |
260 | 2012 | | | 1935 | Jefferson Parish
| Louisiana | United States | bridges |
261 | 2012 | | | 1913 | New York City
| New York | United States | roads & rails |
262 | 2013 | Titan Clydebank crane | | 1907 | Clydebank
| West Dunbartonshire | Scotland | buildings |
263 | 2013 | Waterford Bridges | | 1909 | Troy and Waterford
| New York | United States | bridges |
264 | 2013 | Lake Pontchartrain Causeway | | 1956 | Lake Pontchartrain
| Louisiana | United States | bridges |
265 | 2014 | The Dalles Dam | | 1957 | Columbia River
| Oregon & Washington | United States | dams |
266 | 2015 | Gladesville Bridge | | 1964 | Sydney
| New South Wales | Australia | bridges |
267 | 2016 | Cape Agulhas Lighthouse | | 1848 | L'Agulhas
| | South Africa | water transportation |
268 | 2016 | Arrowrock Dam | | 1912 | Boise and Elmore
| Idaho | United States | dams |
269 | 2016 | All-American Canal[10] | | 1940 | Imperial County
| California | United States | water supply & control |
270 | 2016 | Canal du Midi[11] | | 1681 | Toulouse to Étang de Thau
| Occitania | France | water transportation |
271 | 2016 | Liverpool and Manchester Railway[12] | | 1830 | Liverpool to Manchester
| North West England | England | roads & rails |
272 | 2017 | Bonnet Carré Spillway | | 1931 | St. Charles Parish
| Louisiana | United States | dams |
273 | 2017 | Duluth Aerial Ferry/Lift Bridge[13] | | 1905 | Duluth
| Minnesota | United States | bridges |
274 | 2017 | Mississippi River Basin Model[14] | | 1966 | Jackson
| Mississippi | United States | research & educational |
275 | 2017 | Chaffey Brothers Irrigation Works | | 1887 | Mildura and Renmark
| Victoria and South Australia | Australia | water supply & control |
276 | 2017 | Qhapaq Ñan: The Great Inka Road System[15] | | data-sort-value="-10K+9000" | 1000 BC - 1533 AD | | | Colombia to Chile | roads & rails |
277 | 2017 | Tunnel of Eupalinos[16] | | data-sort-value="-10K+9480" | 520 BC | Samos
| North Aegean | Greece | tunnels |
278 | 2018 | Augusta Canal and Industrial District | | 1845 | Augusta
| Georgia | United States | power generation |
279 | 2018 | Old River Station[17] | | 1907 | Cincinnati
| Ohio | United States | water supply & control |
280 | 2018 | Boundary Layer Wind Tunnel Laboratory[18] | | 1965 | London
| Ontario | Canada | research & educational |
281 | 2018 | Institution of Civil Engineers[19] | | 1818 | London
| | England | research & educational |
282 | 2018 | Union Chain Bridge[20] | | 1820 | Horncliffe to Fishwick
| | England to Scotland | bridges |
283 | 2019 | Kaibab Trail Suspension Bridge[21] | | 1928 | Grand Canyon
| Arizona | United States | bridges |
284 | 2019 | Union Pacific Railroad[22] | | 1868 | Omaha westward
| Nebraska | United States | roads & rails |
285 | 2019 | Silver Bridge Collapse - Creation of National Inspection Standards[23] | | 1967 | Point Pleasant
| West Virginia | United States | bridges |
286 | 2020 | NASA Vehicle Assembly Building[24] | | 1966 | Titusville
| Florida | United States | buildings |
287 | 2021 | Main Avenue Bridge[25] | | 1939 | Cleveland
| Ohio | United States | bridges |
288 | 2021 | Sydney Opera House[26] | | 1973 | Sydney
| New South Wales | Australia | buildings |
289 | 2022 | David Thompson's Surveying and Mapping of the Northwest of North America[27] | | 1814 | | | Canada & United States | surveys & maps |
290 | 2022 | Portage Lake Bridge[28] | | 1959 | Hancock and Houghton
| Michigan | United States | bridges |
291 | 2022 | Salmon Creek Dam[29] | | 1914 | Juneau
| Alaska | United States | dams |
|