We visited the Dan-yr-ogof caves in South Wales during June 2001. They are situated south of Brecon in the Brecon Beacons.

The photo is of a waterfall within Cathedral cave, one of the three caves that we went into.

The cave system in this hill side is immense and well worth a visit. I found it amazing that the caves themselves had not been discovered until the early 20th century.  The stalagmite and stalactite formations are absolutely breath taking in places.  The caves are still getting explored with extra passages been found all the time.

There is also a dinosaur park within the grounds which I feel is certainly an hit with the younger generation.