Penwyllt Circuit

This is an easy walk exploring the remnants of the areas industrial past in the Ogof Ffynnon Ddu Nature Reserve, a cave system under a hill in the Fforest Fawr region of Bannau Brycheiniog National Park (Brecon Beacons)

This trail starts at the car park in Penwyllt Stone Quarry and takes you on a gentle ascent over the moorland hillslope, following grassy tracks and visiting Wern Quarry and Ogof y nos hir, Ogof Ffynnon Ddu (OFD) top entrance, with the bottom entrance being along the side of the Tawe Valley further down the road that leads to Penwyllt.

After exploring the area, follow the grassy tracks back down to the car park. Dogs are welcome, but leads are advised as you make encounter free-roaming sheep along the way.