Neptune Caves

In the heart of the Calestienne, embark on a discovery of the Neptune caves, formerly known as the Adugeoir caves.

Located in Petigny, just 3 km from Couvin, these cavities were carved into limestone hundreds of millions of years old. Discovered at the end of the 19th century, they consist of two levels, now connected by an artificial gallery.

The Neptune Caves are still active: a branch of the Eau Noire river plunges into them before reappearing nearly three kilometers away in Nismes. During the guided tour, you'll discover the various rock formations sculpted by the water and the work carried out by speleologists. To date, only 10% of the river's underground course is known, and explorations continue.

The tour usually ends at the underground river, with a short boat ride accompanied by a sound and light show. However, this part of the tour depends on the water level and may be temporarily suspended in case of drought or adverse weather conditions.

As the number of places is limited, it is recommended to book your tickets in advance and to arrive approximately 15 minutes before departure.

The route includes about a hundred steps and a steep forest path leading to the entrance. Good walking shoes are therefore essential, and flip-flops are not permitted. The visit is not accessible to people with reduced mobility or strollers. For babies, a front-facing baby carrier is recommended.

Before or after exploring the underground world, you can explore the Mont des Sens, an eco-educational trail located outdoors on the hill above the caves. Listening cones, telescopes, a barefoot path, and various installations dedicated to smells and tastes allow you to explore nature by engaging all your senses.

Located within a Natura 2000 area integrated into the Entre-Sambre-et-Meuse National Park, the trail also offers a beautiful view of the Eau Noire river. You might even spot a kingfisher, a wall lizard, or a black woodpecker. A family treasure hunt complements the walk: the investigation booklet is available at the reception desk before setting off.

A large free car park is available at the entrance to the site. Dogs are not allowed inside the caves, but they may accompany their owners on the outdoor walks provided they are kept on a leash. Photography is permitted underground, without flash.