Here, a collection of interesting links about the underground is assorted for you, assigned to various special topics. Multi-focussed websites are mentioned in the corresponding categories.

This Museum of Brewery is situated in the Eifel, a mountain range close to the German-Belgian border. Monschau, a small city there, has a spectacular cave of rocks, and this is exactly where you may find this museum. It presents... more

If one did not know what to do with their spare time while on vacation in California – this is an ideal website. Six caves – Black Charms, Boyden Cavern, California Cavern, Morning Cavern, Sutter Gold Mine – are introduced... more

On this site, the visitor will find information on many grottos and caves in Switzerland, presented in some essays and many photographs. In addition, you will find general statistics... more