But one of a series of ancient cairns encountered upon a low-level trek from Nant y Maen towards Carn Gron within deepest Mid Wales...
Coflein reckons the monument is:
“A rather irregular cairn, c.6.0m in diameter & 0.6m high, showing elements of kerbing indicating a ring, c.5.0m in diameter; a probable central cist is 1.5m NNE-SSW by 0.7m.” [source: Briggs 1994 (Cardigan County Hist. I), 180-1 fig38.5) J.Wiles 21.07.04]