Town Hall (Hôtel de Ville, map). The Town Hall and its 104-m-tall Belfry is a historical monument and Unesco World Heritage Site.
Cathédrale Notre Dame de la Treille (map). The construction of this cathedral started in 1854 and was eventually finished only in 1999.
La Vieille Bourse (map). Built in 1653, this is a historic and beautiful building with an atrium style opening and inner court. Within the inner court, you may find antique booksellers, posters, and other hidden gems.
The open market Marché de Wazemmes (map). Open every Tuesday, Thursday and Sunday morning, but the busiest day is definitely Sunday. Vendors sell everything from fresh fruits and vegetables, Moroccan, Mediterranean, and Vietnamese food, books, stationery, suitcases, shoes, clothes, and even perfume and undergarments!