You can visit the old town, its belfry listed as World Heritage by UNESCO, cathedral, 13th century ramparts and fortified castle, the best preserved fortification of northern France. The château houses a museum where you can admire a great collection of Etruscan and Ancient Greek vases (the largest collection after that of the Louvre), an Egyptian section devoted to the Egyptologist August MARIETTE, from Boulogne-sur-Mer, and remarkable unique Inuit and Aleut mask collection.