Once the world’s deepest anthracite mine, this former colliery became a museum but has been closed since 2021 due to major structural and safety issues.

Penarth and Cambrian Slate Mines were crucial Welsh operations, evolving from early extraction into significant industrial sites before their mid-20th-century closures.

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.

Crisp Delph is a 19th-century sandstone mine near Skelmersdale, known for its eerie “Dragon’s Eye” ceiling feature.

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

One of England’s oldest lead mines, this Derbyshire site is a Scheduled Ancient Monument valued for its historic, industrial, and natural significance.

Hendre Spar Mine, worked for Fluorspar and Calcite until 1981, was sealed in 2024 due to safety concerns.

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