The Bois de Boulogne Park, which is along the western borders of the city, is a rather wide park, full of woods, paths, cafés in “belle époque” style, but also not so recommendable spots.
Every night the most hidden corners of the park are invaded by prostitutes and people looking for sexual intercourse; although the police controls the sexual traffic of the area, Parisians try to avoid walking alone in the night in such a place.