Marolles (Les), Brussels

This is a traditional working-class neighborhood, dominated by the gargantuan Palais de Justice (constructed in 1866-1883 and until recently the largest building in the world). The Marolles now offers a wide selection of dining establishments and antiques shops. Classy restaurants line up next to smoky bars. The neighborhood is famous for its daily flea market on Place du Jeu-de-Balle, the central square, but arrive early (before 6a!) if you want to pick up the genuine bargains.