Best caves around Comblain-Au-Pont are situated in the Ourthe Valley, a region known for its significant natural limestone formations. This area, approximately 30 km from Liège, is recognized for its underground cavities and geological importance. The landscape features a variety of natural rock structures formed over millions of years through water infiltration and erosion. These sites offer insights into the region's unique geology and preserved ecosystems.
Last updated: May 28, 2026
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Nice rocky path along the Ourthe
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Varied and surprising: forest, climbing, valleys, meadows, city!
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Entrance fees (including the underground boat tour) may vary depending on the season. Children aged 3–11 pay €14, teenagers €17, adults €20, and seniors aged 60 and over €16. Reduced rates are available for people with reduced mobility. The caves are open daily from 9:30 a.m. to 5:00 p.m. Payment can be made in cash or by credit card. Reservations can be made online or by phone. A special tour for people with reduced mobility is available—please contact us in advance if you require one.
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Approach (Parking) 50.556177, 5.579821 This massif consists of various climbing routes with varying degrees of difficulty. 1) La Dalle → The Slab 2) Porche de la Grotte → Portal of the Grotto or Entrance to the Cave 3) Porche Triangulaire / The Anticlinal → Triangular Portal / The Anticlinal 4) Dalle Supérieure → Upper Slab 5) Les Bombés → The Overhangs
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Coordinates: 235.87/139.12/85 The cave is located on the Esneux-Tilff road, on the right bank of the Ourthe River, 1 kilometer before entering Tilff. The large entrance is approximately 20 meters above the road, at the foot of a very steep limestone cliff. This cave has been known for a long time: it was discovered during quarrying in 1837. In the 1960s, the "Réseau Lemaire" was discovered; an upper level with beautiful calcite pools and a lake. Source: https://www.scavalon.be/avalonnl/fiches/fich23.htm
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One of the many caverns in these hills. In this cave a utensil was found in the shape of a beetle (coléoptère).
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The undergrowth is quite open, the ground covered with blackberries and holly, it's original, and very beautiful. The path is especially superb when it runs along the stream, the Chawresse, which gives it its name, and which you have to ford twice (on stones and very slippery woods), it's sporty, my sidekick and I liked it, we took up the challenge and by being united, we succeeded without getting dirty or getting our feet wet!
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Beautiful slab routes, recent re-equipment of certain sectors
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Beyond the well-known Grotte de l'Abîme, you can explore several other interesting sites. The Natural Rock Tunnel near Bomal offers a unique experience where you can walk through a natural rock formation. For those interested in history, the Coléoptère Cave is notable for its archaeological discoveries, including a cockchafer-shaped pendant. The Chawresse Trail also features numerous underground cavities along a stream, popular with cavers.
The caves in the Comblain-Au-Pont region, particularly the Grotte de l'Abîme, are renowned for their impressive limestone formations. You'll encounter spectacular concretions such as stalactites, stalagmites, fistulous formations, and gours. Specific features like the 'salle du Mondmilch' and 'salle de la cascade' showcase these natural wonders, often highlighted by special lighting during tours. The region's geology, at the border of the Condroz and Famenne regions, is a key aspect of their formation.
Yes, the Grotte de l'Abîme is considered very family-friendly. Guided tours are designed to be engaging for both adults and children, with guides explaining the cave's formation, geology, and ecosystem through presentations, models, and even games. The Remouchamps Caves also offer a family-friendly experience, including an underground boat tour, which is a unique attraction for all ages.
Guided tours at the Grotte de l'Abîme typically last approximately 75 minutes. This duration allows visitors to explore the main sections of the cave and learn about its features and history from knowledgeable guides.
Caves maintain a constant, cool temperature regardless of the outside weather. For the Grotte de l'Abîme, the temperature is around 10°C (50°F) year-round. It's advisable to wear warm clothing, such as a jacket or sweater, and comfortable, sturdy shoes suitable for walking on potentially uneven or damp surfaces. Some caves, like the Grotte de l'Abîme, involve many steps (640 steps), so good footwear is essential.
The Comblain-Au-Pont region offers a variety of outdoor activities. You can find numerous hiking trails, including routes like 'Comblain-au-Pont: Thier Pirard to the Butter Bread Rocks' or 'The "Felsenfenster" of the Tartines loop'. For cyclists, there are gravel biking routes and road cycling routes that explore the Ourthe Valley and surrounding areas.
Yes, the Coléoptère Cave is classified among Belgium's most interesting caves due to significant archaeological discoveries made there in the 1920s. These findings included a cockchafer-shaped pendant, which is now housed in the Cinquantenaire Museum in Brussels. The Grotte de l'Abîme itself has also been the subject of extensive scientific study, contributing to its historical and scientific interest.
The Grotte de l'Abîme is generally open for tours, but it's important to note that certain parts of the cave are closed to the public during winter to protect hibernating bats. This makes spring, summer, and autumn ideal times for a full exploration. Always check the specific opening hours and seasonal closures for any cave you plan to visit.
The Grotte de l'Abîme is generally not accessible to people with reduced mobility due to the significant number of steps (640) and uneven terrain. However, the Remouchamps Caves offer a special tour for people with reduced mobility; it's recommended to contact them in advance to arrange this.
The Grotte de l'Abîme is recognized as an 'underground cavity of scientific interest' due to its preserved ecosystem and its role as a crucial winter shelter for numerous bat species. Eight different species of bats have been observed there, a Belgian record. It has also been the subject of scientific papers on topics like carbon dioxide distribution and stalagmite formation, highlighting its geological and ecological significance.
Yes, the region around Comblain-Au-Pont is known for its natural beauty. The Natural Rock Tunnel near Bomal is also listed as a viewpoint. Additionally, the area features dolomitic rock sculptures and waterfalls, and a 10 km geological path nearby offers further insights into the region's geology and flora, providing scenic views.
Visitors frequently praise the educational and engaging guided tours, especially at the Grotte de l'Abîme, where guides are known for their enthusiasm and knowledge. The tranquil and serene atmosphere, with moments of absolute silence and the sound of dripping water, offers a unique sensory experience. The impressive formations and the opportunity to experience total darkness deep within the earth are also highlights for many.


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