"Round Cairn I, Ffynon Las, is situated on a local rise to the immediate east of a trackway along the ridge of Cefn Moel at 360m above sea level. It is a turf-consolidated stony mound measuring 8m in diameter. Its height is 0.4m on the east, 0.2m on the west. At its centre is an irregularly-shaped hollow about 2m across and 0.2m deep.
It is possible to see this monument as one element in a wider prehistoric funerary and ritual landscape given the proximity of several sites of contemporary date including a ritual complex (NPRN 403768). This particular cairn is relatively well preserved and therefore holds a strong possibility for preserved burial remains, structural features and a buried land surface."