A small defended enclosure, probably Iron Age, upon the north-eastern flank of Pen Milan, Brecon Beacons. According to Coflein it is:
‘A small, multivallate enclosure with wide spaced ramparts, on the north east facing lower slopes of Pen Milan... four platforms, or terraced areas, covering an area of c.100m by 50m, may have formed a coherent hillslope defended enclosure.‘