These underground galleries in the Bock rock dating back to the invasion of the Spaniards then enlarged with the Vauban fortifications These UNESCO heritage underground galleries in the Bock rock face are really worth the visit. The DKV Urban Trail finishes in style with a race in the dark of the Galleries before returning to the Judicial City!
Starting point: the montée de Clausen.
Attention to opening hours. Casemates are closed from November to February.