From GGAT record:
A small well-preserved round cairn within the remains of a ring cairn or low counterscarp bank. A triangulation pillar has been erected on top of the cairn, but the damage is minimal.
The round cairn is 6.60m in diameter and 0.50m high. The ring cairn/counterscarp is 13.3m in external diameter, 1.5m wide and 0.20m high.
The ring cairn is best preserved on the southern third of its circumference, the remainder of its circuit having been largely destroyed.
The site stands on the summit of Twyn yr Hyddod with spectacular views over the Sirhywi valley to the east and the Brecon Beacons to the north.
