L:
V:

OyC upstream


NGR:   
m.asl

Merthyr Tydfil , Northern Outcrop - East (Morlais to Abergavenny)
map using leaflet map:
Access
Description
History
Hydrology Tests
Conservation
Cambrian Cave Registry entry 725-OyCu
© Caving Wales ⓗ Ogofa Cymru