Au cœur de l'Ardoise — Attraction in Bertrix

The mines itself and the explanation was interesting but sadly enough in desperate need of an update. While it didn't take anything away from the view or it's educational value; the electronic guide system needs new tapes. It still talks about visiting the lower levels later on while they aren't available anymore and flooded by water. It also refers to pictures that are no longer on the wall. Even despite that it's certainly worth a visit and not all that expensive so if you want to learn something about shale and how it is won; be sure to visit. You can also find shale decorations and plates in the shop for small prices. Be sure to bring cash though since you can't pay by card due to lack of network that way...

It's a different take on visiting a mine since you're equipped with a helmet, an explanation of the posts (where you can listen to commentary) and you're free to roam on your own through the mine. When we visited we felt like we were the only ones in the mine (which was probably the case since you backtrack a few times and we didn't see anyone else) which was a weird experience. Passing other visitors would be tricky since the mine is narrow and low. The commentary is interesting...

Nice little museum telling the story of the slate miners of the Ardennes, which might otherwise be forgotten. The visit leads you to the first underground level in the old mine, about 25 meters below the surface. Be prepared to climbs steps and walk the mines tunnels (which are both wide and high enough for easy access by foot). The audio guides are only in French and Nederlands, but the text is available in...