The Belgian province Luxembourg is located west of the country Luxembourg, and actually much bigger than the small Grand-Duchy, but much less populous. The densely wooded Ardennes region has some karst and some slate mining.
Bertrix Slate Mine
Musée Minier et Métallurgique de Musson-Halanzy
Grottes de Hotton - Grottes de 1001 Nuit
Grotte Saint-Remacle
Route de l’Ardoise