Pen y Fan
At 886 metres (2,907 ft), Pen y Fan, translated as ‘The Mountain’s Peak’ or ‘The Beacon’s Summit’, is the highest peak in South Wales, situated in the Breacon Beacon’s National Park.
The summit is marked by a well preserved and structured Bronze Age cairn with a central stone cist. The cairn is fitted with a series of concentric stone kerbs to protect the central mound from slippage. The cist is a box formed by vertical stone slabs near the centre of the barrow, and it currently has the National Trust summit sign on it, but would have held the ashes or other remnants of a dead person or people. There would also have been grave goods left with the human remains, such as flint tools, cinerary urns and flower tributes.
Pen y Fan is formed from Old Red Sandstone, which were laid down during the Devonian period. The upper slopes of the mountain are formed from those of the Brownstones Formation, whilst the lower slopes are formed from the sandstones and mudstones of the Senni Formation. The summit, like that of neighbouring Corn Du, is composed of hard-wearing sandstones of the Plateau Beds Formation.