east. Storey Arms The Storey Arms is an outdoor education centre beside the A470, the main trunk road between the north and south of Wales, in the Brecon Beacons National Park near Libanus, Powys, Wales. Run by Cardiff City Council since 1971, the residential centre can accommodate up to 58 people. Its activities include kayaking and canoeing, caving, hill walking, rock climbing and white water rafting. The centre is at above sea-level, along the pass between Pen y Fan and Fan Fawr, at the foot of Corn Du. It takes its name from a large coaching inn with a pitched slate roof (named after a local landowner, Storey Maskelyne), which was demolished in 1924. The site of the original inn is east of the centre, on the northeastern edge of the Pont ar Daf car park. Buses stop on either side of the A470 outside the centre. The car park at Pont ar Daf, from the Storey Arms centre, is the most popular access point for tourists and walkers to Pen y Fan. The car park, which has space for around 50 cars, is owned by the Welsh Government. Toilet facilities are available at the site. A footpath connects the Storey Arms centre, bus stops and the Pont ar Daf car park to the path leading to Corn Du and Pen y Fan. Summit The summit lies on a ridge stretching from Talybont Reservoir in the east, to the A470. About to the south-west lies the subsidiary top of Corn Du, beyond which the terrain drops at a moderate angle to the subsidiary top of Y Gyrn then more steeply to the Storey Arms on the A470. To the east, the ridge drops steeply to the col connecting it to Cribyn, the next mountain along the ridge. From Corn Du, a ridge with an east-facing escarpment descends south towards Merthyr Tydfil. Climate In Winter, Pen y Fan often has a covering of snow. The amount of snow varies significantly from year to year. After a heavy snowfall, the mountain is a popular destination with local skiing enthusiasts. Archaeology The summit is marked by a well preserved and structured Bronze Age cairn with a central stone cist, similar to that on the nearby summit of Corn Du. The grave is fitted with a series of concentric stone kerbs to protect the central mound from slippage. The cist is a box formed