Llygad Llwchwr - Llygad Llwchwr is a 1.2 km long cave system in the Black Mountain which forms the westernmost range of the Brecon Beacons National Park in Wales.The entrance to the cave system is 400m from the road alongside a public footpath and just above and to the left of an obvious river resurgence. The cave contains a dry high level series and an active river level which is accessible at a number of river chambers separated by sumps. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
A:
Natural Place