Blue John Mine.
This is a link to the Blue John Mine website. The mine is located in the county of Derbyshire close to the village of Castleton.
http://www.bluejohn-cavern.co.uk/
This is a link to the Blue John Mine website. The mine is located in the county of Derbyshire close to the village of Castleton.
http://www.bluejohn-cavern.co.uk/