Brecon Beacons National Park – Western a… by Ordnance Survey Sheet map, folded
Brecon Beacons National Park – Western and Central Areas/Parc Cenedlaethol Bannau Brycheiniog – Ardaloedd Gorllewinol a Chanolog: Sheet OL12 (OS Explorer Map Active). Author:Ordnance Survey. Publisher:Ordnance Survey.