If you use our contact form, your request will be sent directly to the appropriate contact person within our association. By doing so, you will help us to answer your request as fast as possible.

In the main season from April to October we do not assign bookable group tours on weekends.

Information on capacities and prices can be found here: Price list for groups 2023/2024 (PDF)

In our Underground FAQ and in the important tips sections, you will find the answers to the most frequently asked questions.

I would like to inquire about a group tour.

I have questions concerning certain subterranean buildings.

I have questions concerning the association and the membership.

I wish to use rooms for an event.

I wish to use rooms for filming.

I have questions / notes concerning our Online-Shop.

I have a request not mentioned here.