Two cairns on Mynydd Gellionen. Coflein descriptions:
South cairn (SN7030427)
The remains of a denuded cairn measuring 12.5m-13.7m across and 0.3m high with the remains of a cist near its W side. (1989)
North cairn (SN70190462)
A circular stony patch, probably a cairn base, 13.7m-14.9m in diameter with a raised rim1.8m-3m wide and 0.3m high. The rim is practically destroyed on the SW. A small modern cairn has been erected near the NE edge. (1989)