| |
| | Blue John Mine and Cavern, Castleton , Hope Valley, England |
 | | Blue John Mine, Mam Tor, Castleton, Hope Valley, Derbyshire is a popular cavern which was once mined for lead and Blue John. |
 | | The Blue John Cavern is at the top of the hill above Winnats Pass and is reached from Castleton either by walking up the hillside or by going up Winnats Pass and turning down the old Mam Tor road (now closed between the Blue John Mine and Treak Cliff). |
 | | It descends a long series of steps to reach a large chamber known as Crystalised Cavern, which is followed by Lord Mulgrave's Dining-Room and the Variegated Cavern, all of which contain fine formations and interesting minerals. |
| www.cressbrook.co.uk /visits/bluejohn.php (399 words) |
|