Craig y Cilau

Craig y Cilau is a limestone escarpment in the Brecon Beacons National Park in Powys, Wales.

It is situated on the north side of Mynydd Llangatwg in Llangattock community, about 2 miles (3.2 km) south-west of Crickhowell.

The range of habitats is equally wide with woodland and scrub in the lower parts and moorland higher up.

The limestone cliffs are home to many scarce plants including angular solomon’s-seal (Polygonatum odoratum), hutchinsia (Hornungia petraea) and the most southerly British population of alpine enchanter's nightshade (Circaea alpina).

One of the caves, Agen Allwedd, holds a roost of lesser horseshoe bats during the winter months.