Lengthy Welsh cave with numerous round and through trip options with a very fine streamway and formations.
Ogof Ffynnon Ddu II (& Ogof Craig a Ffynnon) (S.Wales weekend) - By Duncan Jones, 12/13-03-11.
Ogof Ffynnon Ddu 1 round trip (S.Wales weekend) - By Duncan Jones, 18-07-09.
Ogof Ffynnon Ddu 2 through trip - By Duncan Jones, 18-05-02.
Ogof Ffynnon Ddu (South Wales weekend) - by Sarah Cooper, 25-10-03.