Blue John - Treak Cliff Cavern

Blue John - Treak Cliff Cavern is shown and named in a reusable Geograph picture. The saved point is the picture's recorded map point.

Treak Cliff Cavern, known for its Blue John mineral deposits, is a limestone cave formed by the dissolution of Carboniferous limestone through glacial and post-glacial water action. The cavern has a long history of human use, including as a source of Blue John for ornamental purposes since the 18th century and as a tourist attraction since the 19th century.