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The Neptune Caves: a place of relaxation and discovery located in an exceptional setting.

Located in the heart of the “Calestienne”, the site of the Neptune Caves offers you a unique and unspoiled natural setting.

Explore the caves to discover a fascinating underground world hidden in the depths of a rock aged hundreds of millions years,  or wander on our trails in search of the typical species of this protected area belonging to the Natura 2000 network.

Do you prefer relaxing while admiring the spectacular landscape? We welcome you under our covered terrace to enjoy an ice cream chosen among a wide selection, or to savour a local drink at your leisure.

Are you here for holiday or for a relaxing day? Your children will have the opportunity to climb and have fun in our brand new wooden playground.

Useful information

The Caves

Plunge during 45 minutes into an extraordinary scenery made up of beautifully emphasised creations of nature. Whether you are a child or an adult, an underground enthusiastic or simply looking for a unique experience, take part in our astonishing guided tour and end this adventure with the magic of our sound and light show on the underground river!

Want to know more? Extend your tour … Clear and beautifully illustrated information boards are available on the outside path of the tour. Four themes are approached: “Where does our limestone come from?”, “the river l’Eau Noire (literally “The Black Water”) and the karstic phenomena”, “A fauna and a flora to protect” and “The Caves, an environment conducive to life?”



The “Mont des Sens” (literally “Hill of the Senses”) is a fun marked trail over the “roof” of the Neptune Caves that offers you a splendid view on the river “l’Eau Noire”. Encounter our specific species: wild orchids, digitalises, lizards, birds of prey, and many more.

Try out this typical nature differently, thanks to 9 stopping points along the path meant to awaken your senses.

A descriptive leaflet of this path is available at the reception chalet or is downloadable below:

Walking map “Mont des Sens”


Our other trails:

Do you prefer a longer trail? Several possibilities are available to you:

  • Discover « La Promenade Tienne du Lion » (green signs – 5,8km). This trail starts from the parking lot
  • Follow a geological walk on the “Calestienne” (no signs – 2 loops of around 9km – downloadable on the following website: www.foretdupaysdechimay.be)
  • Test the geocaching trail (information at the reception chalet)

Walking maps on sale at the reception (9€).

Download our trails and more on the website www.foretdupaysdechimay.be or via the links:

Promenade du Tienne du Lion

Randonnée géologique


Our playground!

Our young visitors will be pleased to have fun in our brand new playground accessible to children from 3 to 12 years old. This playground is entirely free during our opening hours.

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  • Rue de l’Adujoir 24

    5660 Couvin

  • +32(0)60 31 19 54
  • info@grottesdeneptune.be
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