Best caves around Gamlen are primarily found in the Nettetal region, characterized by its historical slate mining industry and natural rock formations. The area offers insights into the region's industrial past, with several former mine sites now accessible as points of interest. These locations provide a glimpse into the geological and historical landscape of Gamlen, situated near the Moselle. The terrain includes both natural cave-like structures and man-made mining excavations.
Last updated: June 27, 2026
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It is hard to imagine the working conditions of the miners who went into the mountain to laboriously mine the slate.
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A photogenic relic of an old mill is this water wheel on a tributary of the Nette.
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These were mainly private mining chambers. Those who hike here from the end of April to the end of June have the opportunity to listen to wonderful nightingale concerts.
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With the two Mosel slate mines Katzenberg (Mayen) and Margareta (Polch) of the company I. B. Rathscheck Söhne KG, Moselschieferbergwerke, the largest slate production in Central Europe was located near Mayen in this region with - according to their own statements - a market share of 80%. The Margareta mine near Polch-Nettesürsch was in operation until 1996. It was accessed with a 485 m long conveyor ramp in the form of a helix, which enabled truck transport from underground. Source: Wikipedia
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It is easy to imagine that this old slate pit now serves as a winter quarters for bats.
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This is the entrance to one of the 37 slate quarries in the former Trimbs slate district. Attention: Due to the danger of collapse, entering the tunnel is prohibited!
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Here is the excavation chamber of the former Barbara slate pit in Trimbs. The Barbara mine belonged to Salomon Oppenheim in 1890. The Oppenheim mines Hasenloch in Hausen, Barbara in Trimbs and four other mines in Mayen were combined in 1893 to form the Moselschiefergesellschaft mbH.
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The Gamlen area offers a mix of natural rock formations and historical mining sites. You'll find natural niches, small caves, and extensive former slate mine excavations, providing insight into the region's geological and industrial past.
Yes, the Small cave on the Felsensteig is a manageable natural cave that is particularly interesting for children and makes a nice resting spot. The Waterwheel at the Margareta Slate Mine water tunnel is also considered family-friendly, offering an educational glimpse into mining history.
Several locations highlight Gamlen's slate mining heritage. The Waterwheel at the Margareta Slate Mine water tunnel features an old mill wheel still driven by water, symbolizing the industry's importance. The Old Slate Mine Tunnel extends 6-8 meters deep into the Schieferberg, offering an exciting exploration of a historical site. Additionally, the Extraction chamber of the former Barbara slate mine provides a legacy of the once-largest slate mining area west of the Rhine, though entering the tunnel is prohibited due to collapse danger.
The Old Slate Mine Tunnel is considered an exciting cave for exploration, extending several meters deep. For those seeking a more challenging natural experience, the Castor Cave is a large rock niche with historical legends, but access is difficult and dangerous due to overgrown paths, steep slopes, and loose rock. Visiting it is not recommended due to the hazards.
The Castor Cave is primarily known for its legends, particularly the 'salt miracle' associated with Saint Castor. However, the path leading to it is no longer maintained and is considered dangerous due to vegetation, steep slopes, loose rock, and unmarked sections. Visiting is undertaken at your own risk and is generally not recommended due to the hazards.
Beyond exploring the caves, the Gamlen region offers various outdoor activities. You can find numerous hiking trails, such as those detailed in the Hiking around Gamlen guide. There are also MTB trails for cycling enthusiasts, which you can explore in the MTB Trails around Gamlen guide, and running routes available in the Running Trails around Gamlen guide.
The caves and former mines around Gamlen are primarily characterized by their slate formations, a result of the region's extensive slate mining history. While not always featuring dramatic stalactites or stalagmites, the geological interest lies in the exposed rock faces and the structure of the mining excavations themselves.
Visitors appreciate the unique blend of natural rock formations and historical mining sites. Many enjoy the educational aspect of learning about the region's slate mining past, particularly at sites like the Waterwheel at the Margareta Slate Mine water tunnel. The smaller, more accessible caves like the Small cave on the Felsensteig are popular for their resting spots and appeal to families with children.
No, it is not safe to enter all cave sites. For instance, entering the tunnel at the Extraction chamber of the former Barbara slate mine is prohibited due to the danger of collapse. Similarly, access to Castor Cave is dangerous and not recommended due to unmaintained, steep, and unstable paths.
The caves and former mine sites around Gamlen can generally be visited year-round. However, for exploring the surrounding trails and enjoying the natural environment, spring through autumn offers the most pleasant weather conditions. During winter, some paths might be slippery or more challenging due to ice or snow, especially for sites with unmaintained access like Castor Cave.
The provided information does not specify organized guided caving tours for the individual sites. However, the historical mining locations often have information signs that provide context. For a deeper understanding, you might look for local historical societies or tourist information centers in the broader Nettetal region for potential guided experiences related to the mining history.
When visiting the caves and mine sites around Gamlen, it's advisable to wear sturdy, closed-toe shoes suitable for uneven terrain. Layers of clothing are recommended as temperatures inside can be cooler than outside. If you plan to explore any tunnels or darker areas, a headlamp or flashlight is essential. For sites with challenging access, like Castor Cave, appropriate outdoor gear and extreme caution are necessary, though visiting such sites is generally not recommended.


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