Former Lead mine beneath High Tor in Matlock later used for pigment production.

An underground Limestone quarry spanning over 35 Kilometers.

A remote sea cave on the Pembrokshire coast, home to some of the best cave formations in the UK.

A former underground ammunitions depot.

A former limestone quarry in Wiltshire.

A 19th-century slate quarry, known for its extensive underground workings and rugged mountain setting.

The last working mine in Derbyshire known for producing Fluorspar.

A small cave system lying beneath the popular Chrome Hill in Buxton.

Part of the longest continually operated slate mine in the world until its closure in 2003.

a key Derbyshire chert source active from the 1800s to 1961.

A Former slate mine active from 1820 to 1970, is now a flooded "Car Cave" filled with abandoned vehicles and appliances.

Maenofferen Slate Mine in Blaenau Ffestiniog is a historic Welsh quarry that grew into a major slate producer in the 19th century.