Best caves around Irmtraut are found within the Westerwald region, an area known for its diverse geological formations and natural beauty. This landscape features karst formations and volcanic rock, providing various underground experiences. The region offers opportunities to explore unique natural monuments and historical sites.
Last updated: May 14, 2026
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The cave is hidden in a sheltered spot near the water, where you can easily imagine why the "cavemen" chose it as their place of residence. Today bats live there, so it is closed. But you can look inside and there is a bench and an information board about bats and the Neolithic finds.
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Simply fascinating and definitely worth a visit to the eternal ice. Pleasant cooling off on hot days and you can also linger here very well. A sign explains the phenomenon of "Eternal Ice" in a way that everyone can understand. We will definitely come back here.
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unfortunately you cannot enter the cave
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Interesting geological feature. Well signposted and you can feel the cold air immediately.
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If the temperatures rise above 30 degrees and make us sweat a lot, then a visit to the Eternal Ice in Dornburg is recommended, where the outside temperatures are a pleasant 20 degrees and very close to the mountain even drop to 3 degrees. Everyone has probably heard of the eternal ice in Dornburg. I was also familiar with it, but unfortunately I had never been there myself in all those years. Due to a professional appointment, I was lucky enough to get to know this place for the first time. Coming from Frickhofen in the direction of Wilsenroth, there is a small car park on the right after the building yard, from which it is 300 meters to the Eternal Ice. The closer I get to the spot, the noticeably cooler it gets. Cool air from the mountain The place itself seems quite inconspicuous at first. Two large, barred openings allow a view of the mountain. You are at the end of a slope covered with basalt boulders. A clear draft can be felt in front of the openings. There is still snow in one of the openings. It was shoveled in in winter so that visitors to this place can get an idea of how cold it is in the mountain, Joachim Habel from the Frickhofen Culture and History Association explained to me. The thermometer goes down in no time and stays at 3 degrees Celsius. It was a funny coincidence, because only one day later the Hessenschau was there and reported on the coolest place in Hessen. Since the eternal ice is a unique natural phenomenon in the Westerwald, it is part of the Geopark Westerwald-Lahn-Taunus. In 1839, while demolishing basalt rock, workers discovered icing beneath the mass of rubble. Deep in the mountain, the rocks are frozen to a depth of eight meters. Now with the hot temperatures, this ice is not visible. It would also make no sense to remove stones, because then the ice would melt very quickly because of the lack of insulation. The mountain made of basalt rock has numerous cracks and crevasses that promote ice formation. Furthermore, this is favored by the large difference in height between the inlet and outlet openings for the air. These are all prerequisites for a chimney effect to occur. The rubble on the slope has a heat-insulating effect. The incoming warm air from outside penetrates the mountain and cools down. Cold air is heavier and sinks downwards - thereby drawing new air into this "chimney" from above. The cold air flows back out at the two ends of the tunnel. This cool draft can be felt very well when you stand in front of it. From there it is worth a slight climb to the Hildegardisfelsen, from which there is a wonderful view. The Hildegardis chapel and the fountain as well as the Celtic wall at the former Dornburg can also be discovered there. They are all part of the Blasiussteig. An interesting area on the doorstep and a recommended visit given the current temperatures.
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The cave is a cultural monument and is among other things inhabited by bats. It is closed with a grille and is therefore not open to the public.
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The caves in the Westerwald region, near Irmtraut, are known for their diverse geological formations, including karst landscapes and volcanic basalt structures. You can find unique natural phenomena like the Eternal Ice at Dornburg, which offers a natural cooling effect, and prehistoric sites like the Bärenloch Prehistoric Karst Cave, which was likely used as a shelter by Stone Age people.
The most significant cave system in the broader vicinity is the Herbstlabyrinth-Adventhöhle-System in Breitscheid, located about 25-30 kilometers from Irmtraut. It is the largest cave system in Hesse, featuring the impressive 'Knöpfchenhalle' with its pristine stalactite formations and a 30,000-year-old cave bear bone.
Yes, guided tours are available for the Herbstlabyrinth-Adventhöhle-System in Breitscheid. These tours typically last about 45 minutes and are led by trained guides who provide geological facts and insights into the cave's formations and history.
The Bärenloch Prehistoric Karst Cave is a notable historical site, believed to have been used as a shelter by Stone Age people. Additionally, the Bear cave, while now home to bats, has an information board detailing Neolithic finds. The Herbstlabyrinth-Adventhöhle-System also features a 30,000-year-old cave bear bone on display.
Caves generally maintain a constant temperature year-round, making them suitable for visits in any season. For example, the Herbstlabyrinth-Adventhöhle-System has a constant temperature of 8°C (46.4°F), offering a cool escape during warmer months. The Eternal Ice at Dornburg is particularly appealing on hot days for its natural cooling effect.
Many natural attractions in the Westerwald region are family-friendly. The Herbstlabyrinth-Adventhöhle-System, with its modern lighting and constructed pathways, offers an immersive and respectful viewing experience suitable for small groups. The Eternal Ice at Dornburg is also considered family-friendly and fascinating for all ages.
Given the constant cool temperatures inside caves (around 8°C or 46.4°F) and high humidity, it is advisable to wear warm clothing, even in summer. Comfortable, sturdy shoes with good grip are also recommended for walking on potentially uneven or damp surfaces.
The Herbstlabyrinth-Adventhöhle-System in Breitscheid features a visitor trail constructed from glass-reinforced plastic, designed to minimize environmental impact while enhancing accessibility. While some historical caves like the Bärenloch Prehistoric Karst Cave are currently not accessible due to grids, the Eternal Ice at Dornburg is easily reachable from a nearby car park.
For the Eternal Ice at Dornburg, there is a small car park located a few hundred meters away, making it convenient to access. For the Herbstlabyrinth-Adventhöhle-System, visitor parking is available at the site in Breitscheid.
The Westerwald region offers a variety of outdoor activities. You can explore the Holzbach Gorge, a popular natural attraction with a wild-romantic circular hiking trail. For more hiking options, check out the Hiking around Irmtraut guide, which includes routes like the 'Hohe Hahnscheid Wäller Tour'. Mountain biking is also popular; find trails in the MTB Trails around Irmtraut guide.
The caves in the region showcase diverse geological features. The Herbstlabyrinth-Adventhöhle-System is renowned for its exceptionally clean, white to transparent stalactite formations (speleothems), including unique 'excentriques'. The Eternal Ice at Dornburg is a natural phenomenon where cold air creates a chimney effect, leading to unique ice formations. The area also features basalt-related cave formations, such as the Basalt Cave and Basaltstein Cave.
While specific cave access rules for dogs can vary, many outdoor trails in the Westerwald region are dog-friendly. For instance, the Holzbach Gorge offers a scenic experience that can be enjoyed with dogs. Always check local signage or specific attraction websites for the most up-to-date regulations regarding pets.


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