Best caves around Sassen are primarily found in the Eifel region of Germany, characterized by a rich history of mining and unique geological formations. The area features former barite and slate mines, alongside natural caves shaped by geological processes. These sites offer insights into historical industrial activities and local folklore. The landscape around Sassen provides a setting for exploring both man-made tunnels and natural cave systems.
Last updated: June 27, 2026
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1 million years of geology. Worth putting your bike aside for a moment.
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surprising sight when walking the theme path in our direction
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The Ulmener Maar tunnel connects the Ulmener Maar with the Jungferweiher Maar and is 120 meters long and 70 cm wide at its narrowest point. Different rock layers from the volcanic history can be seen. Display boards and paintings on the tunnel make the history very interesting. The tunnel was used to channel water from the two maars into the Ulmener Bach to the mills. Next to the tunnel, two drains and bulkheads are used to regulate the water level.
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Information about the Maar Stollen can be found, for example, at https://www.gesundland-vulkaneifel.de/ulmener-maar-stollen-entdecker-tour/#:~:text=Ulmen%20neu%20erleben&text=Den%20Maar%2DStollen%20kannst %20you, just%20once%2070%20cm%20wide. find
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The whole thing is worth seeing and you can also take a break and relax here
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It's called the Ulmen Maar Tunnel and connects the Jungferweiher pond and the Ulmen Maar. The tunnel is finished and has been open to the public since April 25, 2023. It's turned out simply fantastic. A visit is definitely worthwhile. It's open in the summer months from 6 a.m. to 8 p.m. In winter, it's also open during the day. The circular and hiking trail around the Jungferweiher pond and the Ulmen Maar is wheelchair accessible. Cycling through the tunnel is prohibited, as the tunnel is only 70 centimeters wide at its narrowest point. You don't need to be claustrophobic. A visit to the Ulmen Castle ruins, with its fantastic view over the town of Ulmen and the Ulmen Maar, is also highly recommended.
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The Ulmener Maarstollen was completed in 2023 and connects the Jungferweiher with the Ulmener Maar. Hopefully it stays as clean and beautiful as it was when I visited yesterday.
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The Sassen area, particularly in the Eifel region of Germany, offers a mix of historical mine tunnels and natural geological formations. You'll find former barite and slate mines, as well as natural caves shaped by geological processes.
Yes, the region is rich in mining history. You can visit the Matthias-Josef Stollen Slate Mine, an interesting historical place with a shelter made of quarry stone, ideal for a short break. Another notable site is the Bergkrone Mine Tunnel, a former barite pit with a nicely designed entrance, though the tunnel itself is currently closed.
At Juliusstollen and Kaulenmännchen Sculpture, you can access a few meters of the tunnels before an iron door blocks further passage. It's recommended to bring a good flashlight to illuminate the interior. The site also features a sculpture commemorating the legend of the 'Kaulenmännchens'.
Yes, the Heinzelmännchen Cave is a natural cave with a local legend about 'brownies' or 'elves' finding a new home there. Above the cave, you'll find loungers carved into tree trunks, offering a great view over the Mimbachtal.
The Julius-Stollen Slate Mine is a beautifully maintained area with informative signs and slates. It offers a lot to discover and marvel at, providing insights into the region's slate quarrying history.
The area around Sassen offers various outdoor activities. You can find numerous hiking trails, including routes like 'Grenzen, Galgen und Geschichte' or loops around local lakes. There are also road cycling routes and running trails to explore the scenic Eifel landscape.
The Matthias-Josef Stollen Slate Mine is categorized as family-friendly, offering an interesting historical site that can be enjoyed by visitors of all ages.
Visitors particularly appreciate the historical insights offered by the former mines and tunnels, the unique geological formations, and the local legends associated with some of the natural caves. The area is also valued for its scenic beauty and opportunities for outdoor activities.
The caves around Sassen, especially the natural ones, feature formations shaped by millions of years of geological processes. The region's history of mining also means you'll encounter man-made tunnels and structures that reveal the composition of the local rock, such as slate and barite deposits.
Many of the historical mine sites, like the Julius-Stollen Slate Mine, provide informative signs and displays detailing the mining operations and the significance of minerals like baryte (Schwerspat) in the region's past. These sites offer a direct look into the industrial heritage of the Eifel.
Yes, above the Heinzelmännchen Cave, there are loungers on the slope that provide a great view over the Mimbachtal, allowing you to enjoy the surrounding natural landscape.


Extend your search for the best caves by checking out these guides of the top ones around Sassen: