Rhyndwyclydach is a rectangular earthwork enclosure, c.21m across, on ground falling generally to the SSE, resting above steep natural scarps on the NE, elsewhere ditched about; an irregular rampart, rising up to 4.7m above the ditch, occupies the N part of the enclosure, facing rising ground: thought to be a medieval castle, the site has no recorded history.

Source: RCAHMW 1991 Glamorgan III.1a 'the Earlier Castles', 142-3 [UW2].

J.Wiles 12.10.04