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.
Last updated: June 3, 2026
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Hiking around Malmedy
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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Old source above the path that is now almost dry. Traces of the watercourse run along the path and into the valley of the Trôs Marets.
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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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The Mother of God depicted and venerated here is the one from Lourdes. This well-known Marian pilgrimage site is located in the French Pyrenees and is visited by many people every year, including many sick people who hope for healing. The devotional image of the Mother of God has become widespread - not only in France - and believers have built Lourdes chapels and grottos everywhere. The church's memorial day for "Our Lady of Lourdes" is February 11th, the anniversary of the Marian apparition (1858), when the Mother of God appeared to 14-year-old Bernadette Soubirous in a rock grotto very close to Lourdes. Bernadette later became a nun and died at the age of just 35. On December 8th (the Feast of the Immaculate Conception of Mary) 1933, she was canonized by Pope Pius XI. The commemoration of the Madonna of Lourdes is also World Day of the Sick.
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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: https://www.mini-ardenne.be/poi.card.php?language=fr&id=2848
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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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.


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