The area of the southern Limburg district is very rich, a valuable rock is found underground: limestone. This seems a bit strange, as limestone is a rather common and cheap rock nowadays. In former times, when transport was rather difficult and expensive, so the existence of those quarries was rather important for the Netherlands. The limestone was needed for building, mortar, the garden and to make white colour.
There are maybe thousands of limestone quarries and other underground caverns. They are not connection, but they were built because of similar reasons, which was the search for limestone. Several of those caverns are open to visitors. They are not listed separately because of the lack of information. Most of them are either not accessible or only after talking to the owners, which is a bit difficult for foreign tourists, especially if they do not understand the language.
A GoGo Valkenburg
Museumkelder Derlon
Duivelsgrot
Fluweelengrot
Gemeentegrot
Geulhemmergroeve
Grottenaquarium
Jezuïetenberg
La Caverne
Maastricht Kazematten
De prehistorische vuursteenmijnen van Rijckholt - St. Geertruid
Romeinse Katacomben
Schuilen in Maastricht
Sibbergroeve
Grotten St. Pietersberg
Steenkolenmijn Valkenburg
Prehistorische Vuursteenmijnen te Valkenburg aan de Geul
The Vault