Shoulsbury castle

Shoulsbury Castle is an Iron Age hill fort close to Challacombe in Devon, England. It takes the form of a multi-ditch and rampart enclosure close to the top of a hill on the shoulder of Shoulsbarrow Common at an elevation of 472 metres above sea level.
Shoulsbury Castle is unusually rectangular and on a western hill spur suggesting that it is either Roman or Iron Age. It is the largest and best known hillfort on Exmoor that over the years has been referred to as Solsbury, Shorsbery, Salusbury, Shoulsbury, Showlsborough, Shoulsbarrow in various texts over the Centuries . The area was occupied from the Iron Age into the early Saxon period by the Dumnonii people. In the 18th Century it was suggested it was the work of the druids for the celebration of religious rites or ‘feats of activity or athletick exhibitions’

Wikipedia