UNDERGROUND QUARRIES OF THE COVERED MARKET

If you pass by Cambrai, don't be fooled by appearances because it hides a secret (not so secret): dozens of kilometers of underground galleries, vestiges of chalk quarries that were exploited in the Middle Ages, and even in the Gallo-Roman era. Today, they are no longer exploited, but they have kept many uses. To discover them, ask the tourist office about the possibility of a guided tour.