Blue John Cavern
This cavern has a pure form of fluorite known as Blue John. This semi-precious stone is worked for jewellery and larger pieces for a long time; the ruins of Pompeii contain vases made from this material. During your visit through these caves, you can admire the very high caverns with superb mineral colourings and chalk formations - stalactites, stalagmites and columns.
Address :Cross, S33 8WH Castleton
Price:10 £ (children 5 £)
9.30am-5.30pm (winter: dusk)