Garreg Las

Garreg Las, also known as Twyn Swnd, is a subsidiary summit of Fan Brycheiniog in Bannau Brycheiniog (Brecon Beacons) National Park, standing at 635 metres.

At its summit you’ll find two impressive prehistoric cairns called Carnau’r Garreg Las. These ancient burial mounds are thought to hold significant importance due to their sheer scale, each measuring around 20 metres in diameter, and offer a fascinating glimpse into the area’s early history.