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Malmedy

Top 6 Caves around Malmedy

Caves around Malmedy offer diverse underground experiences within the Belgian Ardennes region, known for its natural beauty and as a starting point for exploring the High Fens. While Malmedy itself features unique geological formations, the wider area provides access to a variety of subterranean sites. The region is characterized by its forests, valleys, and rivers, contributing to the formation of numerous caves and grottoes. These sites range from natural rock shelters to historical mining tunnels and religious grottoes.

Best caves around Malmedy

  • The most popular caves is Entrance to Lu Hayîre Slate Mine, a cave that marks the entrance to an old slate tunnel. Slate and hard coal were mined at this site since 1773.
  • Another must-see spot is Cave Above the Path, a natural monument. This old source above the path is now almost dry, with traces of its watercourse running along the path and into the valley.
  • Visitors also love Grotto of Our Lady of Lourdes in Solwaster, a religious building and cave. This grotto was built by inhabitants in recognition of protection during World War II and is a replica of the famous Lourdes Grotto in France.
  • Malmedy is known for natural caves, historical mine entrances, and religious grottoes. These sites offer a variety of experiences, from geological exploration to historical insights and spiritual reflection.
  • The caves around Malmedy are appreciated by the komoot community, with 14 photos and 47 upvotes shared by users.

Last updated: August 10, 2026

Entrance to Lu Hayîre Slate Mine

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At this point is the entrance to an old slate tunnel. Slate and hard coal have been mined at the same site since 1773. In 1868 the "Société forestière du Gospinal" received the concession to mine slate here. The roofing of the Solwaster church is made of this slate.
Unfortunately, the quality of the slate turned out to be not particularly good, so the production was stopped again. In addition, the tunnel was flooded regularly.

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Grotto of Our Lady of Lourdes in Solwaster

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This grotto was built by the inhabitants in recognition of the protection of the Holy Virgin during the last war, even though two children from the parish died in German captivity. A marble tree (in the vestibule of the church) commemorates their names: Paul Fransolet and Marcel Boudron.
Source: mini-ardenne.be/poi.card.php?language=fr&id=2848

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I came across this tunnel entrance as part of a hike. Unfortunately, I wasn't able to explore the tunnel further at the moment because the water was ankle-high in the entrance area. Perhaps there is a local Komoot hiker along the way who can provide information about this tunnel and, more importantly, where the tunnel leads.

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Place of refuge during World War II

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An attached information board reads:

Christmas 1944 - Bombing December 23, 24 and 25
In this shelter 300 Malmedians, victims of the tragic events in our city, found shelter for several weeks in miserable conditions.

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Mine entrance

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Unfortunately, the entrance is locked with a padlock.

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snc
August 7, 2026, Stolleneingang

What the tunnel is This is a manhole/access shaft (“trou d’homme” = manhole in French) on the Bayehon conduit, a water pipe/gallery in the Hautes Fagnes (High Fens) region of Belgium, near Malmedy/Ovifat. The brick-lined, walkable tunnel in your first photo is consistent with an inspection gallery for a water catchment pipeline. The Bayehon connection The Bayehon is a small stream best known for the Cascade du Bayehon, a 9-meter waterfall near the village of Longfaye (Malmedy), fed by springs on the Hautes Fagnes plateau near Botrange. Importantly, the Bayehon source is documented as one of the headwater sources of the Helle river, a tributary that flows toward Eupen.[wikipedia +1] Why this matters — the Eupen drinking-water reservoir The Helle is one of the streams that feeds Lake Eupen (Barrage de la Vesdre), Belgium’s major drinking-water reservoir. According to the official Walloon infrastructure fact sheet, the reservoir is fed mainly by the Vesdre and Getzbach, “complétée par un captage sur la Helle” (supplemented by a catchment on the Helle), via a dedicated Helle catchment tunnel built in 1949 — 1,200 m long, 2.3 m in diameter, capable of carrying up to 25 m³/s, and covering an extra 3,675 ha of catchment area beyond the lake’s own 6,920 ha basin. That water ultimately supplies drinking water to Eupen, Spa, the Pays de Herve, and parts of greater Liège.[wallonie +1] So the “conduite Bayehon” manhole you photographed is almost certainly a section/access point of this Helle-basin water-catchment network — infrastructure operated by the Service Public de Wallonie that diverts spring water from the Bayehon/Helle headwaters underground toward the Eupen reservoir, rather than a natural cave or abandoned structure. The padlocked gate and asset-tag numbering (PCO-54-ULZ50-AB030) are typical of how Wallonia’s water-infrastructure authority inventories individual access shafts along these buried conduits. I couldn’t find public engineering drawings that name this specific manhole by its exact code, so I can’t confirm precise dimensions or construction date for this particular access point — but the location, terminology, and surrounding hydrology all point clearly to it being part of the Bayehon/Helle water-supply catchment system for Lake Eupen.

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Its on the other side of the goorge re the castle and position on the map is not correct. To be found sligtly further west on the hiking path where a small creek comes down.

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Possibly an old mine shaft for slate mining.

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Nowadays, a sign hangs on the (closed) gate: "Trou d'homme de la conduite Reinhardstein". So it is about a tunnel to/escape route from the nearby castle.

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Situated in the quieter part of the valley. The higher paths are more frequented, rockier and more adventurous than this part. Definitely worth a visit!

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On a hot summer day you can cool off here - the refrigerator effect near the tunnel is impressive!

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It is quite possible that this old slate tunnel serves as a quarters for bats in winter.

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The Grotto of Our Lady of Lourdes in Solwaster is a spiritual place dedicated to the Virgin Mary. It is located in the Wallonia region of Belgium. The grotto was built in 1903 and is a replica of the famous Lourdes Grotto in France. It was built by believers to honor the apparitions of the Virgin Mary in Lourdes. The grotto attracts numerous pilgrims every year who come here to pray, light candles and have spiritual experiences. The grotto is embedded in the rock and features a statue of the Virgin Mary. The area is surrounded by trees and nature, creating a peaceful atmosphere. There is a spring near the grotto that is considered to have medicinal properties. Many people believe that the water has healing properties.

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Frequently Asked Questions

What are the most notable caves to visit in the wider Malmedy region?

While Malmedy itself has unique local formations, the wider Belgian Ardennes region offers several spectacular underground worlds. These include the Caves of Han, known for their immense dripstone formations and underground river; the Caves of Hotton, distinguished by deep gorges and crystal walls; the Caves of Remouchamps, featuring Belgium's longest underground walk and a boat trip on the Rubicon River; the Neptune Caves, unique for their underground boat ride; and the Lorette-Rochefort Cave, which boasts an impressive 60-meter-high central space and sound and light shows.

Are there any historical or cultural cave sites directly around Malmedy?

Yes, directly around Malmedy, you can explore sites with historical significance. The Entrance to Lu Hayîre Slate Mine marks the entry to an old slate and hard coal tunnel that was active since 1773. Another site is the Place of refuge during World War II, a shelter where 300 Malmedians found refuge during the bombings of December 1944.

Can I visit a religious grotto near Malmedy?

Yes, the Grotto of Our Lady of Lourdes in Solwaster is a spiritual place built by inhabitants in recognition of protection during World War II. It is a replica of the famous Lourdes Grotto in France and attracts numerous pilgrims.

What kind of natural cave formations can I expect to see around Malmedy?

The region features diverse natural formations. For instance, the Cave Above the Path is a natural monument, an old source that is now almost dry, with traces of its watercourse running into the valley. The wider Ardennes caves, like the Caves of Han, showcase immense dripstone formations, stalactites, and stalagmites, while the Caves of Hotton are known for their deep chasms and crystal walls.

Are there family-friendly cave tours in the Malmedy region?

Yes, several caves in the wider region are suitable for families. The Caves of Han offer a tram ride to the entrance and captivating sound and light shows. The Neptune Caves provide a unique underground boat trip, which is often a hit with children. The Grotto of Our Lady of Lourdes in Solwaster is also considered family-friendly for a peaceful visit.

Are there any caves near Malmedy that are accessible for beginners in caving?

For those interested in more adventurous caving, the Caves of Hotton offer unique caving trips for the adventurous. The Lorette-Rochefort Cave also provides opportunities for caving courses. For general visitors, the main tourist caves like Han, Remouchamps, and Neptune offer guided tours that do not require prior caving experience.

What outdoor activities can I combine with a visit to the caves around Malmedy?

The Malmedy region is excellent for outdoor activities. You can find numerous running trails, such as the 'Crests of the Warche Loop' or 'Le Tro Maret'. For cycling enthusiasts, there are many road cycling routes, including loops around the Gileppe Dam or along the RAVeL L45. If you prefer hiking, explore mountain hikes like the 'Bayehon Waterfall' or 'Hoëgne Valley' trails.

Are there any wheelchair-accessible caves in the Malmedy region?

The major tourist caves in the wider Ardennes region, such as the Caves of Han, explicitly state that their cave tour and wildlife park walking trail are not accessible to wheelchair users due to the natural terrain and extensive walking involved.

What is the 'Grotte des Nains' in Malmedy?

The 'Grotte des Nains' in Malmedy refers to a communal campsite and not a publicly accessible cave attraction. For more information about the campsite, you can visit malmedy-tourisme.be.

What are the 'Trou Ozer' and 'Grotte du Géographe' in Malmedy?

The 'Trou Ozer' and 'Grotte du Géographe' are identified as cave entrances in Malmedy, notable for their geological formation in 'pudding-rock' (a mix of pebbles and limestone). However, access to Trou Ozer is closed with a steel door, indicating it is primarily for experienced cavers rather than general tourism.

What do visitors appreciate most about the caves around Malmedy?

Visitors appreciate the diverse experiences offered, from geological exploration to historical insights and spiritual reflection. The komoot community has shared 14 photos and 47 upvotes, highlighting the natural beauty and unique character of these sites, including the historical significance of old mine entrances and the peaceful atmosphere of religious grottoes.

What should I wear when visiting caves in the Malmedy region?

Caves maintain a constant cool temperature year-round, typically around 10-12°C (50-54°F), regardless of the outside weather. It's advisable to wear warm layers, even in summer, and comfortable, sturdy shoes with good grip, as paths can be damp or uneven.

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

EupenBüllingenRaerenBaelenStoumontBütgenbachPlombièresLimbourgTroozWaimesSpaTheuxPepinsterWelkenraedtStavelotThimister-ClermontJalhayBurg-ReulandSaint VithAmelLontzenAubelHautes Fagnes-Eifel Natural ParkKelmisHerveDison

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