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.
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.