Berry Castle is an earthwork probably dating to the Iron Age

Iron Age

The Iron Age is the archaeological period generally occurring after the Bronze Age, marked by the prevalent use of iron. The early period of the age is characterized by the widespread use of iron or steel. The adoption of such material coincided with other changes in society, including differing...

 close to Black Dog

Black Dog, Devon

Black Dog is a village in Mid Devon, ten miles west of Tiverton and six miles north of Crediton.The village is on one of the highest ridges of land between Dartmoor and Exmoor, at an altitude of 200m. It enjoys views to both moors, but particularly of Dartmoor from the pub, the Black Dog Inn, a...

 in Devon

Devon

Devon is a large county in southwestern England. The county is sometimes referred to as Devonshire, although the term is rarely used inside the county itself as the county has never been officially "shired", it often indicates a traditional or historical context.The county shares borders with...

 north of Crediton

Crediton

Crediton is a town and civil parish in the Mid Devon district of Devon in England. It stands on the A377 Exeter to Barnstaple road at the junction with the A3072 road to Tiverton, about north west of Exeter. It has a population of 6,837...

 and west of Tiverton. It does not fit the traditional pattern of an Iron Age Hill fort

Hill fort

A hill fort is a type of earthworks used as a fortified refuge or defended settlement, located to exploit a rise in elevation for defensive advantage. They are typically European and of the Bronze and Iron Ages. Some were used in the post-Roman period...

. Although the earthwork would seem to be an incomplete enclosure, it is not at the top of a hill, although it is on the south east slope of a major hill which peaks at 199 Metres above Sea Level.