
Lying at a height of 1820 feet in the Brecon Beacons National Park, Llyn y Fan fawr is a peaty oligotrophic lake of clear water. It lies beneath the formidable Fan Brycheiniog mountain and has a surface area of approximately25 acres. Some parking is available on a lane to the west, from where it's a walk of about 1½ miles across open and often boggy moorland. It's a good place for swimming, but leeches have been recorded here.



