16e. Once a royal hunting ground, the 900-hectare bois is the city’s favourite open space. West of the city centre, its gardens and grottoes, go-kart tracks and race courses (Auteuil and Longchamp) prove an irresistable draw on sunny weekends. Children love the rides in the Jardin d’Acclimatation; and in the Pare de Bagatelle, a park within the park off allee de Longchamp, Charles X’s villa is surrounded by beautiful flower gardens.