Located to the north-west of two stone circles at Nant Tarw, 115m from the western circle (see NPRN 104), lies an alignment of three stones. The largest is what appears to be a fallen, or broken, monolith. It measures some 3m long and 0.75m thick and its base is stone packed. Two further stones stand behind it, 0.43m and 0.28m high respectively.
This kind of arrangement, an alignment of one large and two smaller stones, is similar to that found at Maen Mawr, Cerrig Duon (NPRN 95).

David Leighton, RCAHMW, 15 October 2009