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.
Ordesa y Monte Perdido National Park i Santaló and Lucas Mallada helped promote the reputation of the region and obtain protected status for it. An area of 21 square kilometres containing the Ordesa Valley was declared a National Park on 16 August 1918 by a Royal Decree. On 13 July 1982, it was enlarged to its current 156.08 km2 and its official name was changed to "Parque nacional de Ordesa y Monte Perdido". Ordesa y Monte Perdido National Park Ordesa y Monte Perdido National Park (Parque nacional de Ordesa y Monte Perdido) is an IUCN Category II National Park situated in the Pyrenees of Huesca province,