Llyn y Fan Fawr outflow is to the River Tawe. Much of the land around the lake is peaty and thus wet underfoot. Llyn y Fan Fawr Llyn y Fan Fawr (Welsh: 'lake of the big peak') is a natural lake in the county of Powys, Wales. It lies at the foot of Fan Brycheiniog, the highest peak of the Black Mountain (Welsh"Y Mynydd Du") range within the Brecon Beacons National Park. Created as a result of glacial action, it is one of the largest glacial lakes in southern Wales. The lake is roughly rectangular in shape with its long axis oriented roughly north-south.
Pen-y-clawdd Pen-y-clawdd Pen-y-clawdd is a village in Monmouthshire, south east Wales, situated between Raglan and Monmouth. The village is the site of a medieval fortification and there is a historic church with an ancient cross in the churchyard which is a scheduled monument. Pen-y-clawdd is located about two miles east of Raglan and five miles southwest of Monmouth, on the unclassified road leading from Usk to Monmouth, and to the east of the A449 trunk road. The site of a possible medieval ringwork castle has been identified near the village at . Pen-y-clawdd was granted manorial status in 1349 when it