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.

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

A virtual tour of the oldest Silver Mine in Northern Bavaria situated at the Fichtelberg, north-east of Bayreuth. The visitor can anticipate further links to some other touristic attractions of the Fichtelgebirge Mountains …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