|Location||Taff Fawr valley, South Wales|
|Basin countries||United Kingdom|
Beacons Reservoir (Welsh: Cronfa'r Bannau) is the northernmost of the three reservoirs in the Taff Fawr valley in South Wales. It is owned by Welsh Water. As its name suggests, it is located in the Brecon Beacons National Park in the Powys unitary authority area and within the historic county boundaries of Breconshire.
During periods of low water, the remains of longhouses can be seen. One building overlooking the Taff Fawr has foundations of massive weathered slabs. Flint tools have been found.
- "A Guide To Recreation Around The Reservoirs Of Wales" (pdf). Welsh Water. p. 10. Retrieved 5 January 2015.
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