Aberllyn Zinc Mine: Level 6 (Public)
This is the big no.6 level. It is brick-lined with a lot of nice straws coming down from the roof, some of which are quite long.
Here there is a roaring water sound with water pouring out of the walls and roof. Clearly the level passes through a major fissure at this point.
(Photo of Aberllyn Zinc Mine uploaded by Penitent Miner. Please do not copy without permission).

