Coflein locations/descriptions of three cairns on Gilwern Hill:
Gilwern Hill I (SO09305870)
A cairn, 14m by 15.5m and 0.9m high, with a central depression.
Gilwern Hill II (SO09855909)
A cairn, 18m in diameter and 1.6m high, crowned by a recent cairn.
Gilwern Hill III (SO09845910)
A possible trenched cairn, 7.5m in diameter and 0.5m high, set immediately NW of a larger cairn.