Ogof Draenen
Ogof Draenen is, at 66 km, the longest cave system in Wales and the second longest in Great Britain behind the Three Counties System on the Cumbria/Lancashire/Yorkshire border.
The cave was known only as a small entrance on a steep hillside until several years of digging broke through into major passage development in October 1994. It was then explored at unprecedented speed to become the longest cave in Wales.
Draenen contains a variety of spectacular decorations and some huge passages. Its large size and occasional complexity make the cave a challenge for even experienced cavers.
The cave is managed by the Pwll Du Cave Management Group.
