Caves around Waimes, a municipality in Belgium's High Fens region, are primarily religious grottoes and natural rock formations rather than extensive commercial show caves. This area, part of the wider Ardennes, is characterized by its unique natural landscape and historical significance. Visitors can explore sites that combine natural beauty with local folklore and spiritual importance. The region offers a distinct experience focused on cultural and natural heritage.
Last updated: May 3, 2026
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The Lourdes Grotto was built in 1903 on the initiative of Father Hesseler, the parish priest of Rohren. It is an expression of the deep piety and trust in God of the people. Even today, the grotto is a destination for pilgrims who implore the Virgin Mary for help in times of need.
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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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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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The 'caves' around Waimes are primarily religious grottoes, historical mining tunnels, and natural rock formations, rather than extensive commercial show caves with stalactites and stalagmites. They offer a blend of natural features with cultural and spiritual significance.
Yes, the region is known for its religious grottoes. You can visit the Lourdes Grotto Rohren, an artificially constructed grotto from 1903 featuring unique boulder formations and interior 'stalactites' made from sand and cement. Another significant site is the Grotto of Our Lady of Lourdes in Solwaster, built by inhabitants in recognition of protection during a past war, serving as a spiritual place.
Yes, you can visit the Entrance to Lu Hayîre Slate Mine. This historical site was used for mining slate and hard coal since 1773, though production eventually ceased due to slate quality and regular flooding. It offers a glimpse into the region's industrial past.
The Kroley Marian Grotto is a small, lovingly maintained Marian grotto slightly off the main road, offering a peaceful resting place for reflection. It is cared for by volunteers and is a cherished local place of worship.
For those seeking something more unusual, the Manhole of the Reinhardstein conduit is a tunnel entrance encountered during hikes. While the tunnel entrance is now locked, it presents an intriguing historical and natural feature for adventurous explorers.
Many of the religious grottoes, such as the Lourdes Grotto Rohren and the Grotto of Our Lady of Lourdes in Solwaster, are considered family-friendly. They are generally accessible and offer a peaceful environment suitable for all ages to visit and reflect.
The region around Waimes is part of the High Fens, offering impressive natural landscapes. While the 'caves' themselves are often man-made or rock formations, they are nestled within beautiful natural settings, providing opportunities to enjoy the unique geology and serene environment of the Ardennes.
Visitors appreciate the peaceful atmosphere and the blend of natural beauty with historical and spiritual significance. Many enjoy the tranquility of sites like the Lourdes Grotto Rohren and the opportunity for quiet reflection. The unique historical context of places like the Lu Hayîre Slate Mine also draws interest.
Yes, the caves and grottoes are often integrated into hiking routes. You can find numerous trails in the area, such as those detailed in the Hiking around Waimes guide, which includes routes like 'The great Vennrunde' and 'The magical High Fens in Botrange'.
Beyond hiking, the Waimes region offers various outdoor activities. You can explore mountain biking trails, with options like 'View to Château de Reinhardstein – Robertville Lake loop' found in the MTB Trails around Waimes guide. There are also mountain hikes available, as highlighted in the Mountain Hikes around Waimes guide.
The caves and grottoes around Waimes can be visited year-round. However, for enjoying the surrounding natural landscapes and combining your visit with hiking or other outdoor activities, the spring, summer, and early autumn months generally offer the most pleasant weather conditions.
Yes, many sites have rich histories. For instance, the Grotte Notre Dame de Lourdes in Grosbois, though not in the guide data, is a local replica built in gratitude for a recovery and remained intact during the Ardennes Offensive, which locals considered miraculous. The Kreuz im Venn, near the Richelsley rock, also has local folklore about the devil dropping the rock.


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