Most Belgian underground sites are located in the Namur province, which is named after the city Namur. It is located in the Ardennes, low mountains, or actually hills, with numerous limestone areas and thus natural caves, also some metamorphic rocks, mostly slate.
Abime
Ardois’alle
Brûly-de-Pesche 1940
Citadelle de Namur
Grotte d’Eprave
Grottes de Floreffe
Le Fondry Des Chiens
Parc National de Furfooz
Grotte de Goyet
Grottes de Han-sur-Lesse
Grottes de Lustin
Grotte La Merveilleuse
Grotte de Mont-Fat
Grottes de Neptune
Grotte du père Noël
Les souterrains de Philippeville
Grottes Pont d’Arcole
Grottes de Rochefort
Grotte Scladina
La Grotte de Spy
Route de l’Ardoise