Category:Treak Cliff Cavern
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English: Treak Cliff Cavern, in Derbyshire, England. The cavern is one of only two sources of the mineral Blue John.
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This category has the following 5 subcategories, out of 5 total.
Media in category "Treak Cliff Cavern"
The following 112 files are in this category, out of 112 total.