Pen Cerrig-calch Pen Cerrig-calch Pen Cerrig-calch is a subsidiary summit of Waun Fach in the Black Mountains in the Brecon Beacons National Park in southern Powys, Wales. Its summit, at a height of 701m (2,300 ft), is marked by a trig point. The peak sits high above the River Usk valley as it narrows above the small town of Crickhowell.The views from here are wide-ranging and extend as far as the Beacons themselves to the west. A ridge runs off to the northwest and the shoulder of Pen Gloch-y-pibwr then turns north to the secondary top of Pen Allt-mawr whose peak at
Pen y Garn Pen Pumlumon Arwystli. 21 km to the west is the town of Aberystwyth; Drygarn Fawr lies 20 km to the SSE . Pen y Garn Pen y Garn is a mountain in the Cambrian Mountains, Mid Wales standing at 611 metres above sea level. Pen y Garn tops a 500–600 m high plateau, situated on which is the controversial Cefn Coch wind farm. The summit contains a very large shelter cairn hollowed out from the remains of an ancient burial cairn. The summit also has a trig point. The wind turbines are very near the summit. To the north some