A small multivallate hillfort known as 'Castle-an-Dinas' which contains an 18th century folly called 'Roger's Tower'

The National Heritage List for England records A small multivallate hillfort known as 'Castle-an-Dinas' which contains an 18th century folly called 'Roger's Tower' as a scheduled monument. The saved point comes from the centre supplied by the official record. Listing does not by itself mean that the public may enter the place.

The hillfort at Castle-an-Dinas was originally built by a prehistoric community, likely during the Iron Age, and later incorporated into the landscape by the 18th-century addition of Roger's Tower, a folly built by the local landowner Sir Roger Vyvyan. It is important as a Scheduled Monument reflecting both ancient defensive architecture and Georgian landscape design.