Brecon Beacons National Park

Welsh  Parc Cenedlaethol Bannau Brycheiniog  national park in southern Wales, occupying 519 square miles (1,344 square km) of mountains, moors, forests, pastureland, lakes, and the broad Usk valley. The easternmost highlands in the park are the Black Mountains (old red sandstone) of Powys county, lying east of the River Usk between Abergavenny and Hay-on-Wye, with their highest point at Waun Fach, elevation 2,660 feet (811 metres). Centrally