Milldam Mine - Derbyshire
The last working mine in Derbyshire known for producing Fluorspar.
Middleton Mine (Christmas Edition) - Derbyshire
An underground Limestone quarry spanning over 35 Kilometers.
Rhosydd Slate Quarry - Blaenau Ffestiniog
A 19th-century slate quarry, known for its extensive underground workings and rugged mountain setting.
Ogof Gofan Sea Cave - Pembrokshire
A remote sea cave on the Pembrokshire coast, home to some of the best cave formations in the UK.