Carreg Cennen Castle (Welsh: Castell Carreg Cennen meaning castle (on the) rock (above the) Cennen) is a castle near the River Cennen, in the village of Trapp, four miles south of Llandeilo in Carmarthenshire, Wales. The castle is within the Brecon Beacons National Park, and its location has been described as spectacular, due to its position above a limestone precipice.