| Torr a'Chaisteal | |
| Map Type: | Scotland North Ayrshire |
| Coordinates: | 55.459°N -5.2886°W |
| Public Access: | Yes |
Torr a'Chaisteal (or Torr a'Chaisteil) is an Iron Age fort (dun), located about 10NaN0 northeast of the village of Sliddery, on the Isle of Arran in Scotland .
Torr a'Chaisteal is situated on an isolated grassy knoll on the west coast of Arran.[1]
It was a fortified residence, or dun, of a type common across western Scotland in the later Iron Age.[1] A similar structure can be seen at Kilpatrick Dun NaN0NaN0 to the north.[2] The turf-covered walls are 0.5 metres high and have an average width of 4 metres. The walls are formed of large sandstone boulders, enclosing an area with a diameter of around 7 metres.[1] A short stretch of wall lies beside the dun to the east, while on the landward approach is a substantial earthwork that may have formed an outer defence.[1]
Antiquarian excavations in the 19th century uncovered human and animal bones, shells, the top stone of a quern, and pieces of haematite iron.