Cwm Dwr and the Top Entrance of Ogof
ffynnon Ddu are situated in a National Nature Reserve administered
by the Countryside Council For Wales who require a simple permit system.
Access to Ogof Ffynnon Ddu 1 is also controlled via a permit system.
In order to obtain a permit,
please contact me by email, in plenty of time.
Please have a look at the access
conditions before applying.