an Entity references as follows:
Craig Cerrig-gleisiad is a subsidiary summit of Fan Fawr in the Fforest Fawr section of the Brecon Beacons National Park, South Wales. It makes up half of the Craig Cerrig-gleisiad and Fan Frynych National Nature Reserve with its sister peak Fan Frynych. The summit is marked by a pile of stones, and sits on the edge of steep north facing cliffs which provide one of the few habitats for Arctic–alpine plants this far south in the British Isles. To the south-west is Fan Llia.