St Dennis, Cornwall

St Dennis in Cornwall sits on a strikingly conical hill that was formerly an Iron Age bivallate hillfort with an internal diameter of about 230 feet. The inner rampart was constructed from cleared stone as a dry-built structure, while the outer rampart, 50-60 feet beyond, featured stone facing with an earth and rab core. Professor Charles Thomas investigated the site in 1962, documenting its defensive layout. The medieval church of St Deny's was built within the hillfort's centre, with the churchyard wall following the line of the inner bank. The name may derive from the Cornish word 'dinas' meaning hillfort.