There are eight National Natural Landmarks in Connecticut. They represent the geological and ecological history of Connecticut, including glacial features such as bogs, old growth forests and swamps. There are also well preserved dinosaur tracks,
| Name | Image | Date | Location | County | Ownership | Description |
|---|---|---|---|---|---|---|
| Canaan 42.0572°N -73.3508°W | private | Open space preserve, agricultural preserve, and bio-reserve primarily located in Ashley Falls, Massachusetts and edging into Canaan, Connecticut. The preserve contains over 800 plant species including North America's greatest diversity of ferns. It is open to the public with hiking trails and a visitors center. | ||||
| Norfolk 41.9689°N -73.1622°W | private | The southernmost Sphagnum-heath-black spruce bog in New England. Purchased by the Nature Conservancy in 1956. | ||||
| Salisbury 42.0203°N -73.4664°W | private | A rare undisturbed northern black spruce bog, which is missing the more common Sphagnum moss. | ||||
| Cornwall 41.836°N -73.3252°W | private (The Nature Conservancy) | A large tract of old-growth white pine and hemlock forest owned by the Nature Conservancy which was mostly destroyed by tornadoes in 1989. | ||||
| Chester 41.3875°N -72.489°W | mixed- state, municipal | Known for its Atlantic white cedar swamp within the Cockaponset State Forest. | ||||
| Rocky Hill 41.6519°N -72.6569°W | state | One of the largest dinosaur track sites in North America, with a fine display of early Jurassic fossil tracks in sandstone from about 200 million years ago. | ||||
| Granby 41.9205°N -72.7885°W | private | 4400acres forest in multiple tracts has a very diverse group of species as well as evidence of glacial activity. | ||||
| Voluntown 41.5992°N -71.8781°W | mixed- state, private | Known for the Atlantic white cedar swamp inside the Pachaug State Forest. Includes sections of the Pachaug River and the Great Meadow Brook. | ||||
List of National Historic Landmarks in Connecticut