Ogof Agen Allwedd

Ogof Agen Allwedd
LocationLlangattock escarpment, Wales, United Kingdom
Length20 miles (32.5 km)
GeologyLimestone

Ogof Agen Allwedd or Agen Allwedd, is, at 20.2 miles (32.5 km), one of the longest cave systems in Wales, and the longest cave system on the Llangattock escarpment.

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