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Mertloch

Top 17 Caves around Mertloch

Best caves around Mertloch are found within a region characterized by its geological history, including volcanic activity and historical slate mining. This area offers a variety of subterranean explorations, from natural lava caves to former mine tunnels. The landscape around Mertloch provides opportunities to explore these unique formations, which often hold historical significance.

Best caves around Mertloch

  • The most popular caves is Sieben Stuben Lava Caves, a cave that offers views of Kottenheim from the crater at the foot of the Büdes. These caves historically served as protection during air raids.
  • Another must-see spot is Waterwheel at the Margareta Slate Mine water tunnel, a man-made monument. This site features an old water wheel still driven by water, symbolizing the importance of slate mining in the region.
  • Visitors also love Siewe Stuwe Trail Section, a trail featuring natural monuments and caves. This section includes tunnels that once provided protection during wartime, offering an interesting outdoor adventure.
  • Mertloch is known for lava caves, slate mine tunnels, and historical shelters. These sites offer a glimpse into both natural geological processes and the region's industrial past.
  • The caves around Mertloch are appreciated by the komoot community, with 612 upvotes and 395 photos shared across various highlights.

Last updated: May 14, 2026

Sieben Stuben Lava Caves

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Climb over the Seven Stuben on the Kottenheimer Büden with great views of Kottenheim. In the Second World War, the so-called "Siewe Stuwwe" (= seven rooms), caves in the rock of the crater at the foot of the Büdes, the Kottenheimer population served as protection against the air raids of the Allies.

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Siewe Stuwe Trail Section

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Unfortunately, the area and the ascent of the Siewe-Stuwwe-Weg are bare. Not very nice.

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Old Slate Mine Tunnel

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The tunnel goes about 6-8m deep into the Schieferberg

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Interesting place where you can learn something about mining in the Nettetal.

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Anyone who thinks that an approx. 1m hole in the slate rock (of which there are some on the route of the dream path "Nette-Schieferpfad") is a highlight worth seeing, the detour will be worthwhile for you - but really only for you ...

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Tips from the Community

Nico
November 6, 2025, Sieben Stuben Lava Caves

Impressive colors, especially now in autumn.

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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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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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🪖The tunnels in the mountain once served to protect the population from attacks during the World War🧨... 🎨An interesting, exciting outdoor adventure today. You can enter the cave about 20 meters... Flashlight 🔦 makes sense here. It's scary....- then turn it off for a moment!🖤🫨

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Climbing in is worth it

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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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The Fox Hole is a tunnel entrance to a tunnel between Trimbs and Hausen.

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The water tunnel of the Margaretha mine of the Rathscheck mining company in Nettesürsch was driven into the mountain up to the shaft in 1925. The water is channeled into the Nette. The 220-meter-deep Margaretha mine has had a conveyor shaft since around 1900 and was closed in 1986. From 1992 to 1996 it was operated with a serpentine tunnel as a slate conveyor ramp, which could be used to load lorries with slate.

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Frequently Asked Questions

What types of caves can I explore around Mertloch?

The region around Mertloch is known for its unique geological history, offering a variety of subterranean explorations. You can find natural lava caves, such as the Sieben Stuben Lava Caves, and historical slate mine tunnels, like the Old Slate Mine Tunnel. These sites provide a glimpse into both natural geological processes and the region's industrial past.

Are there any family-friendly caves or cave-related activities near Mertloch?

Yes, several spots are suitable for families. The Sieben Stuben Lava Caves offer small heights and rugged rocks that invite exploration, making it fun for the whole family. Additionally, the Old Slate Mine Tunnel is described as an exciting cave for children. The Waterwheel at the Margareta Slate Mine water tunnel is also a family-friendly historical site where you can learn about mining.

What historical significance do the caves around Mertloch hold?

Many caves and tunnels in the Mertloch area have significant historical importance. The Sieben Stuben Lava Caves and the tunnels along the Siewe Stuwe Trail Section historically served as protection for the local population during air raids in World War II. The Waterwheel at the Margareta Slate Mine water tunnel symbolizes the importance of slate mining in the region, with the mine operating since around 1900 and its water tunnel also used as a shelter during wartime.

Are there hiking trails that incorporate cave exploration near Mertloch?

Yes, the Siewe Stuwe Trail Section is a notable example, featuring natural monuments and tunnels that were once used for protection. While parts of this trail can be challenging and difficult to recognize due to less frequent use, it offers an interesting outdoor adventure for those seeking to combine hiking with cave exploration. Remember to bring a flashlight for the tunnels.

What should I bring when exploring the caves around Mertloch?

For exploring the lava caves and tunnels, a headlamp or flashlight is highly recommended, especially for deeper sections like the Sieben Stuben Lava Caves or the tunnels on the Siewe Stuwe Trail Section. Sturdy shoes are also advisable, particularly if you plan to explore rugged terrain or hiking trails leading to the caves.

Are there any easy-to-access caves or tunnels for beginners near Mertloch?

The Old Slate Mine Tunnel is relatively accessible, going about 6-8 meters deep, and is considered an exciting cave for children, suggesting it's suitable for beginners. The Waterwheel at the Margareta Slate Mine water tunnel is also easily accessible and offers a historical insight without requiring deep cave exploration.

What other outdoor activities can I do near the caves around Mertloch?

The area around Mertloch offers various outdoor activities. You can find numerous hiking trails, including easy to moderate options like the Maifeld Cycle Path loop from Mertloch or the Cross of the Deceased loop from Mertloch. There are also running trails and mountain hikes available. For more details, you can explore the Hiking around Mertloch guide or the Running Trails around Mertloch guide.

Can I visit the caves around Mertloch in winter?

While specific winter conditions for the Mertloch caves are not detailed, some natural caves in the broader Eifel region may close in winter to protect hibernating bats. For man-made tunnels or lava caves, accessibility might depend on weather conditions like ice or heavy snow. It's always best to check local conditions or visitor information before planning a winter visit.

Are there any caves in the wider Eifel region that are worth visiting from Mertloch?

While Mertloch itself focuses on lava caves and slate mine tunnels, the broader Eifel region, known for its karst topography, offers other impressive caves. Examples include the Birresborner Eishöhlen and the Buchenlochhöhle in the Gerolstein region, which are generally freely accessible and showcase different geological formations like ice and millstone caves formed by groundwater erosion.

What are the geological features of the caves around Mertloch?

The caves around Mertloch primarily showcase features related to volcanic activity and slate mining. The Sieben Stuben Lava Caves are natural formations within the rock of a crater, demonstrating the region's volcanic past. The various slate mine tunnels, such as the Fuchsloch Slate Mine Entrance, are man-made excavations revealing the slate rock formations and the history of industrial extraction.

What do visitors enjoy most about the caves and tunnels near Mertloch?

Visitors particularly enjoy the exploratory nature of the sites. The Sieben Stuben Lava Caves are appreciated for their opportunities to climb and explore, offering great views of Kottenheim. The historical aspect of the slate mines, like the Waterwheel at the Margareta Slate Mine water tunnel, is also a highlight, providing insight into the region's heritage.

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

BellMendigKehrigNickenichKretzKruftMonrealMayenTrimbsWellingPolchAndernachPlaidtMünstermaifeldBermelReudelsterzKottenheimThürOchtendungEinigKirchwaldWierschemMackenHatzenportBrodenbachKerbenKolligGeringGierschnachNaunheimPilligKaltLuxemHirtenVolkesfeldGappenachKobern-GondorfRüberNörtershausenAlkenHaustenLangscheidVirneburgLöfArftAchtWelschenbachBreyLehmenSpayOberfellNiederfellRhensDieblichSaffigDitscheidAnschauWaldeschLonnigBassenheimMünkHerresbachWinningenWeißenthurmMülheim-KärlichBendorfSiebenbachNachtsheimUrmitzWolkenVallendarKettigNiederwerthKaltenengers

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