Milefortlet 21 | |
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Type | Milecastle |
Location | |
Coordinates | 54°44′48″N 3°27′01″W / 54.746648°N 3.450398°W |
County | Cumbria |
Country | England |
Reference | |
UK-OSNG reference | NY06734004 |
Milefortlet 21 (Swarthy Hill) was a Milefortlet of the Roman Cumbrian Coast defences. These defences were contemporary with defensive structures on Hadrian's Wall. Its remains exist as reconstructed turf ramparts (to a height of about 1 metre (3.3 ft)) and ditch, reinstated to its original profile (also around 1 metre (3.3 ft)). They are located on a low cliff on the coast, north of the village of Crosscanonby, and just inland from the coastal road. It is the only milefortlet to have been fully excavated[1] and is open to the public.