The site is 807 feet (246 m) above sea level, on a hill at the heads of two tributaries of the River Ottery.[1][2] There are views to Lundy Island and Dartmoor.
The fort is one of the largest earthworks in Cornwall. It is an oval enclosure, area about 7.5 hectares (19 acres). There are two concentric ramparts and ditches; the ramparts are up to 5.8 metres (19 ft) high, with ditches up to 2.7 metres (8.9 ft) deep. Between these, in the southern part, are the remains of an earlier rampart.[1][3]
3D view of the digital terrain model
The inner rampart has two original entrances, inturned and facing each other, on the north-west and south-east, and there are corresponding simple entrances in the outer rampart.[1][3]
Pillow mound
The pillow mound in the centre of the fort
In the centre of the fort is a medieval rabbit warren: a rectangular mound, or pillow mound, about 22 metres (72 ft) long, 10 metres (33 ft) wide and 0.6 metres (2.0 ft) high. It is known as "The Giant's Grave" or "King Arthur's Grave".[1][2]
