Usk Reservoir: Remote yet a New Reservoir
Usk Reservoir is the 'newest' reservoir in the Brecon Beacons National Park, completed in 1955.
I like this area as I like remote areas that are people-free zones. Yet it is very accessible. As one of the remotest parts of the Brecon Beacons it offers fine views of the Carmarthen Fans.
The reservoir is surrounded by a large area of coniferous forestry which is largely impenetrable. However there are some fun little paths you can explore along streams if you really want to get into no mans land.