Llyn y Fan Fach of the Lady of the lake in Welsh and English. Llyn y Fan Fach Llyn y Fan Fach (Welsh meaning "Lake of the small hill") is a lake of approximately 10 hectares on the northern margin of the Black Mountain in Carmarthenshire, South Wales and lying within the Brecon Beacons National Park. The lake lies at an altitude of approximately , immediately to the north of the ridge of the Carmarthen Fans. It is the smaller of two lakes within this mountain massif: the slightly larger Llyn y Fan Fawr is about to the east. The lake is overlooked by
Pen y Fan 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