Official classification of an attraction in Wallonia - 2 suns
  • Attractions
  • Woodland, nature reserve or natural area
  • Grottoes and caves
  • Guided tour and discovery

Discover the exceptional setting of one of the last Belgian slate quarries.

Work in this slate quarry stopped in 1947. During this 45 minutes visit, you will tell learn more about this industry, wander through its mysterious galleries, home only to bats these days, and see the beautiful aquifer there.

The final themed room presents the exploitation techniques used in the quarry via a documentary.

Make sure you wear warm clothes for your visit. The temperature in the galleries remains at 10 degrees throughout the whole year, humidity being over 80%.

Make the most of your stay in the region to visit other local sites. You can, for example, combine this visit with the Récréalle train, try kayaking, go mountain biking or hiking... Nature is all around.

Visit Ardois'Alle and discover the secret beauty of the Semois valley.






Rue de Reposseau 12,5550Alle-sur-Semois
The information provided is an indication only. We advise you to inquire directly with the organisers of the event that interests you before you leave.


Minimum duration : 0:45

Langue d'accueil



Guide available/groups - FR - NL - Guide available/individuals - FR - NL

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