Caves around Oberzissen are located in the volcanic Eifel region, an area known for its diverse geological formations and rich natural history. This landscape features ancient volcanic activity, which has created a variety of subterranean environments, including lava cellars and former millstone quarries. The region offers opportunities to explore natural monuments and historical sites. These geological features provide a unique setting for visitors interested in the natural and cultural heritage of the area.
Last updated: May 19, 2026
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The Trass Caves in the Brohl Valley are deep, branching cave passages made of volcanic trass rock – formed around 13,000 years ago by the eruption of the Laacher See volcano.
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The Devil's Bone is a cooled lava flow whose bizarre shape was created by volcanic processes and erosion.
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On the 🧡Dream Trail, dotted with many highlights, this is a real outdoor highlight, practically an adventure playground for adults: Impressive large trass caves...- Endless photo opportunities beckon here📸🎨🖌. Pleasantly cool & refreshing, especially in the warmer summer season🌞🌡. There are also numerous free parking spaces, some of them shaded, next to the large 🚂viaduct🌞🌡
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The freely accessible trass caves in the Brohltal are located below Bad Tönisstein on the Brohltalstraße (Federal Highway 412) at the height of the "Jägerheim" inn. The caves were formerly used by the trass millers: they had the raw material, the freshly cut trass "arks", dried there.[1] There are parking spaces for cars near the caves. The Kell Cave and Gorge Trail, a circular hiking trail, leads past the trass caves. Source: https://www.aw-wiki.de/index.php/Trassh%C3%B6hlen_im_Brohltal
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Great cave passages, don't forget your flashlight
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After the Trass caves, which are very easy to walk through, the volcano and panoramic trail awaits you with a challenging climb. In some sections, the trail is secured with ropes.
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It's a shame that the Sandkaul Caves are used by some people as a dumping ground for their garbage.
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An almost alpine climb. Closed from November to February inclusive for safety reasons.
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The Eifel region, including areas near Oberzissen, offers a diverse range of caves. You can find volcanic caves, historical mining caves, and natural rock shelters. These include ancient lava cellars, millstone quarries, and caves with archaeological significance, showcasing the region's rich geological and historical past.
Yes, several caves in the broader Eifel region are suitable for families. The Trass Caves Brohltal are considered a hiking highlight with a jungle-like atmosphere that children often enjoy. The Sandkaul Caves near Ettringen, a former volcanic rock mining area, also offer an interesting historical exploration for families. Additionally, the Trass Caves in the Brohl Valley – Deep Cave Passages are described as 'fun for young and old to explore the "secret" caves'.
Many caves in the Eifel region offer a glimpse into history. The Genoveva Cave is a historical site within a forest setting, once used as a shelter. The Sandkaul Caves near Ettringen were historically used for protection during World War II. Further afield, the Kakushöhle holds archaeological significance with settlement traces from Neanderthal groups dating back 80,000 years BC, and the Lava Cellars in Mendig were historically used by breweries for beer storage.
Absolutely. The Eifel region is known for its volcanic geology. The Lava Cellars in Mendig are a result of centuries of basalt and lava mining, featuring cathedral-like halls. The Ice and Millstone Caves of Gerolsteiner Land, such as the Birresborn Ice Caves and Mühlsteinhöhlen Hohenfels-Essingen, were formed by basalt extraction and can feature impressive icicles in winter. The Elfengrotte near Bad Bertrich, also known as Käsegrotte, has unique rock formations resembling stacked cheese loaves, formed by hot basalt flows.
When exploring caves in the Eifel, especially those that are freely accessible and less developed, it's advisable to wear sturdy shoes. Many caves, particularly the millstone and lava caves, can be dark and adventurous, so bringing a flashlight is essential. For some explorations, a helmet might also be recommended for safety.
While specific dog-friendly policies vary by cave, many natural outdoor cave formations in the Eifel region are accessible to dogs, especially those that are part of hiking trails. For example, the freely accessible Ice and Millstone Caves of Gerolsteiner Land are generally open, but it's always best to check local signage or specific site information for any restrictions, particularly regarding protected areas or hibernating bat populations in winter.
The region around Oberzissen offers numerous outdoor activities. You can find excellent hiking opportunities, such as the trails around the Trass Caves Brohltal, which are considered a hiking highlight. There are also mountain hikes and cycling routes in the area. For example, the Kakushöhle is part of a varied hiking experience in the North Eifel.
Visitors frequently appreciate the unique blend of natural beauty and historical significance. The 'mighty rock faces and jungle-like atmosphere' of the Trass Caves Brohltal are often highlighted. The historical context of sites like the Genoveva Cave and the views it offers of Lake Laach are also popular. Many enjoy the adventurous exploration of the smaller, less developed caves and the insights into the region's volcanic past.
The Eifel region's caves offer unique photographic opportunities. The 'jungle-like atmosphere' and 'mighty rock faces' of the Trass Caves Brohltal provide dramatic scenery. The Lava Cellars in Mendig, with their 'cathedral-like halls' and 'mighty pillars,' create striking compositions. In colder winters, the Birresborn Ice Caves can feature impressive icicles, offering a rare chance for stunning ice photography.
Many caves in the Eifel region, such as the Buchenloch Cave and Mühlsteinhöhlen Hohenfels-Essingen, are open year-round. However, some freely accessible ice and millstone caves may be temporarily closed in winter to protect hibernating bats. If you wish to see the impressive icicles in caves like the Birresborn Ice Caves, visiting during colder winter months would be ideal, but be prepared for potential closures and ensure you have appropriate gear.
While specific accessibility details vary, some caves are more straightforward to explore. The Trass Caves Brohltal are noted for having a visible exit, which can be reassuring for those with claustrophobia or beginners. The freely accessible ice and millstone caves, while requiring sturdy shoes and a flashlight, generally offer a more natural, less guided exploration suitable for those new to caving, provided they exercise caution.


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