Crug Hywel

Crug Hywel is an Iron Age Celtic hillfort, with a clearly visible earth and stone ditch and rampart [1]. The name is sometimes given to the flat-topped hill itself, which is also called Table Mountain in English [1]. Located at the southern edge of the Black Mountains in south-east Wales, it rises to 451 m above sea level, from the southern flank of Pen Cerrig-calch, and overlooks the town of Crickhowell, whose name derives from Crug Hywel [1]. The Welsh name Mynydd y Begwn is also used for this summit [1]. The hill is formed from Old Red Sandstone originating in the Devonian period, specifically the sandstones of the Brownstones Formation, topped by rocks of the Quartz Conglomerate Group [1].