Backdrop with impressive effect

The "Slate Cave" as an atmospheric world of knowledge

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You are now at a depth of 500 metres. As soon as you step out of the mine lift after your exciting descent, you can't help but be amazed. In front of you is the slate cave, elaborately designed by a group of freelance artists and stage designers. The large, dark vault looks so realistic that you have the feeling it is real.

Huge slate pillars seem just able to support the massive ceiling. Above them lie thousands of tonnes of rock and earth. Light installations strongly set the stage for the artificial stone formations. Let the fascinating atmosphere take effect on you.

The slate cave is one of the highlights of your visit to the museum. But it is not only visually impressive. The multimedia exhibits also arouse your interest. At numerous vertical water columns you can test for yourself howCO2 dissolves in water. You are welcome to try it out!

Nature Geyser Background

Customer testimonials

Your opinions & experiences

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Nice excursion with a nice explanation. We had a very nice trip to the geyser. The geyser was very impressive to see. Special thanks to the staff, who were very friendly and helpful, and thus made the excursion possible for us (help due to walking disability).  

Customer testimonial from

Absolutely recommendable! In an interactive tour, you can learn about the formation of a geyser in a playful way. The absolute highlight is the boat trip to the geyser, where you can see the natural spectacle live.

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We were there with the whole family, grandparents, parents and children! There was something for everyone and it was very interesting! Just a super great day spent with the whole family!

Facebook Customer testimonial from

It is a wonderful hands-on museum. Even small children can try things out and explore here. Older children and adults learn a lot of new things. The accompanying boat trip is a highlight. The geyser experience at the end is just great. The staff are polite and nice. Very helpful. The museum is also suitable for prams. Parking is scarce, but with a bit of luck you can get to the...

Customer testimonial from

The boat trip to the geyser was informative and you were told how the geyser was formed. There was a lot of staff on site who were happy to share their knowledge. Talking to the staff was very helpful and informative.

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The Andernach geyser rings in the new season!

The Geysir Expedition starts the new season on March 24. It's time to discover the beauty and power of nature and experience unforgettable moments together. Be there when the Andernach geyser unleashes its majestic splendor and amazes us!