Ogof Craig a Ffynnon is a cave in Wales. The cave is about 7 km in length and is located at the base of a quarried rockface in the Clydach Gorge. Water flowing out of the cave is a resurgence of water

Ogof Agen Allwedd or Agen Allwedd, is, at 20.2 miles, one of the longest cave systems in Wales, and the longest cave system on the Llangattock escarpment.