What is recorded here
Middle entrance to Ogof Ffynnon Ddu system
Cwm Dwr is a karstic cave formed through the dissolution of limestone, typical of the Carboniferous Limestone geology in the region. It has been explored as part of the larger Ogof Ffynnon Ddu system but lacks distinct archaeological or folklore associations.
This does not grant access. Check current paths, opening conditions and ownership before entering.
Places near here
Quarry CottagesOld home or work place · 257 yd
Penwyllt Quarry Railway, Lower SectionRailway · 270 yd
Pen-Wyllt Silica BrickworksBrickworks · 545 yd
Stone wall ring on Carreg LwydStanding or carved stone · 792 yd
Carreg LwydMountain / peak · 944 yd
Small waterfall on Nant ByrfeWaterfall · 983 yd
Dan-Yr-Ogof FarmNature reserve · 1.0 mi
Dan-Yr-Ogof ShowcavesHeritage attraction · 1.1 mi
Carreg CadnoMountain / peak · 1.1 mi
Dan-Yr-OgofCave · 1.2 mi
Dan-Yr-Ogof Show Caves - Bone CaveCave · 1.2 mi
Culvert under Brecon Forest TramroadForest or wood · 1.7 mi