Llwyn-on Reservoir Tower

Llwyn-on Reservoir is the largest and southernmost of the three reservoirs in the Taff Fawr valley in South Wales and is located in the Brecon Beacons National Park. The dam is adjacent to Llwyn-On village. Nant Gwinau, Nant Car and Garwnant are the major streams that enter the reservoir. To the east of the reservoir is the 462m mountain of Garn Ddu, and to the west is the 485m mountain of Cadair Fawr. There are a variety of guided walks and waymarked paths.