Maen Llia

Maen Llia is a Bronze Age standing stone on moorland in Bannau Brycheiniog (Brecon Beacons) National Park, Powys, Wales. Composed of Old Red Sandstone conglomerate, it stands 3.7 m high and 2.8 m wide, with an estimated 1.2-1.8 m buried below ground. CADW dates its erection to 2300-800 BCE. The stone likely served as a waymarker along an ancient route that later became the Roman road Sarn Helen. Local legend claims it walks down to the River Llia to drink when the sun is low.