Records of both natural cave systems and man made mining networks. Reports include geological features, tunnel layouts, extraction methods (where applicable), environmental conditions such as stability and water presence and how subterranean systems have been utilised as tourist destinations over the years and becomes ever more popular highlighting peoples curiosity to see these hidden sites.
Ystrad Einion Lead Mine - Wales
A small metal mine worked intermittently from around 1700 until it closed in 1903, producing modest amounts of lead, silver, zinc, and copper
Grange Cavern Military Museum - Wales
The former Grange Cavern, once a wartime arms store and later a major underground museum, now lies silent after its scattered collection and unresolved missing artefacts.
Cefn Coed Colliery Museum - South Wales
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/Cambrian Slate Mine - Llangollen
Penarth and Cambrian Slate Mines were crucial Welsh operations, evolving from early extraction into significant industrial sites before their mid-20th-century closures.
Side Mine - Matlock
Former Lead mine beneath High Tor in Matlock later used for pigment production.
Middleton Mine (Christmas Edition) - Derbyshire
An underground Limestone quarry spanning over 35 Kilometers.
Ogof Gofan Sea Cave - Pembrokshire
A remote sea cave on the Pembrokshire coast, home to some of the best cave formations in the UK.
Chatterley Whitfield Underground Experience - Staffordshire
A former underground coal mining museum.
Sallet Hole - Derbyshire
A mixed-mine that had been worked for lead, barytes, and fluorspar, closing in 1998.
Rhosydd Slate Quarry - Blaenau Ffestiniog
A 19th-century slate quarry, known for its extensive underground workings and rugged mountain setting.
Milldam Mine - Derbyshire
The last working mine in Derbyshire known for producing Fluorspar.
Oxlow Cavern - Castleton
A part natural, part mined cavern in Derbyshire. known for its impressive size and connecting systems.
Water Icicle Close Cavern - Monyash
Water Icicle Close Cavern in Derbyshire is a mix of natural cave passages and old mine workings, known for its formations and a deep entrance shaft.