Best caves around Verviers are found within the surrounding Liège Ardennes region, an area characterized by its rich geological formations and historical mining heritage. The landscape features numerous underground sites, including natural caves, ancient mining tunnels, and sinkholes. This region offers a blend of natural wonders and insights into industrial history, making it a notable destination for subterranean exploration.
Last updated: May 3, 2026
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This region is home to numerous sinkholes, where flowing surface water from streams disappears into cracks in the chalky subsoil, emerging much lower down in the landscape. The most famous is the Chantoir in Olne. The Ry de Vaux stream disappears into the subsoil here, flowing through an underground cave system and reservoir. It is fed by other surrounding water and re-emerges in several karst springs in Vaux-sous-Olne, 760 meters further and 60 meters lower!
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Also called Château Chrouet, after Dr. Warnier Chrouet, who had it built around 1700. Its facade was kept simple. At the rear, large windows overlooked the green Vesdre valley from the hill. A striking feature of the facade is the 17th-century entrance portal in carved limestone with a canopy (canopy) above it. This was typical of many buildings of that period in Olne and was locally called a "teutê." We also see some on the cemetery portal and the municipal garden, but most have been lost over time. The castle's teutë was embellished with a charming turret.
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The Olne sinkhole, where the Ry de Vaux stream plunges into the subsurface, emerging 60 meters lower in Vaux, at various points, and then reemerging nine days later. It flows through an underground cave system, flowing through other water bodies and a reservoir.
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is currently dry, unfortunately
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Small cave with bat passage..
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Bats hibernate from early November to the end of March. Please leave the animals alone during these five months. Thank you.
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Bats 🦇 are allowed to fly in and out
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The Vennbahn border tunnel between Belgium and Luxembourg is closed to protect the winter quarters of rare bat species. The path to the tunnel is beautifully designed with bat information boards. The detour of about a kilometer there (and back) on the Belgian side to the gate at the tunnel entrance is worth it. Shortly before the tunnel entrance it suddenly becomes quite cold.
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The region around Verviers offers a variety of underground experiences. The Caves of Remouchamps are particularly renowned for their unique underground river boat trip. For those interested in industrial history, the Mine entrance and Geul sinkhole — Plombières Nature Reserve and the Oskar Tunnel (Oskarstollen) offer insights into the region's mining past. Additionally, the Grube Auberg Bat Cave Entrance provides a glimpse into a natural bat habitat.
The Caves of Remouchamps are famous for their navigable underground river, the Rubicon, and impressive limestone formations like 'The Cathedral' and 'The Palm Tree.' You can also observe fossils of ancient marine life. The Grube Auberg Bat Cave Entrance features a small stream inside and serves as a bat habitat.
Yes, the region has a rich mining heritage. The Mine entrance and Geul sinkhole — Plombières Nature Reserve is an industrial and natural site where zinc and lead ores were mined for centuries. The Oskar Tunnel (Oskarstollen), a 500-meter long tunnel, was historically used to transport ore from the 'Schmalgraf' mine.
Many caves, like the Caves of Remouchamps, maintain a constant temperature of 8 to 10 degrees Celsius year-round, making them a cool escape in summer and a mild destination in winter. It's advisable to check specific opening hours for each site, but the stable temperature often allows for year-round access.
The Caves of Remouchamps offer a unique experience with both walking and a boat trip, which can be engaging for families. The Mine entrance and Geul sinkhole — Plombières Nature Reserve is also categorized as family-friendly, offering a blend of nature and history that can appeal to various ages.
The Grube Auberg Bat Cave Entrance is specifically noted as a habitat for bats. Other caves, particularly those with less human disturbance, may also host various cave-dwelling species, though specific wildlife sightings can vary.
The duration of cave tours varies by site. For instance, the Caves of Remouchamps involve a 1200-meter walk followed by a 700-meter boat trip, which can take a significant portion of time. For historical sites like the Oskar Tunnel (Oskarstollen), exploration might be shorter, depending on how much of the surrounding area you wish to see. It's best to check the specific tour length for each cave you plan to visit.
Beyond the immediate vicinity of Verviers, the broader Ardennes region is home to other renowned caves. These include the famous Caves of Han, known for their immense formations, and the Hotton Caves, unique for their multi-level system and natural charm.
The region around Verviers offers numerous outdoor activities. You can find excellent options for gravel biking, road cycling, and hiking. Many routes pass through scenic landscapes, including the Parc naturel des Sources and the High Fens, providing opportunities to combine cave exploration with other adventures.
Given the constant cool temperatures inside most caves (around 8-10°C), it's advisable to wear warm layers, even in summer. Comfortable, sturdy shoes with good grip are also recommended, as paths can be damp or uneven. A light jacket or sweater will ensure a more comfortable experience.
Visitors frequently appreciate the unique blend of natural beauty and historical significance. The underground boat trip at Remouchamps is a major highlight, offering a tranquil and mysterious experience. The historical mining sites like Plombières provide a fascinating glimpse into the region's industrial past, while the natural formations and bat habitats offer a connection to the local ecosystem.
No, the Artificial Tunnel of the Gueule River is not a natural cave. It was dug by humans in 1861 to divert the course of the Gueule river and prevent flooding in the nearby Plombières mines. It's an impressive example of historical engineering blending with the natural landscape.


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