Tags: Cave.
Ogof Agen Allwedd or Agen Allwed also known as Aggy is at 32½ km long one of the longest cave systems in Wales and the longest cave system on the Llangattock escarpment where Ogof y Daren Cilau is also found.There are several round trips that can be followed within the system but all trips start via the short entrance series and first boulder choke which is mostly easy caving.