Various residential neighbourhoods surround downtown in all directions, but expansion is greatest to the south and west, and has tended to follow the course of the two major rivers. The urbanized area in Winnipeg is about from east to west and from north to south, although several areas remain underdeveloped. The largest park in the city, Assiniboine Park next to the affluent neighbourhood of Tuxedo, houses the Assiniboine Park Zoo and the Leo Mol Sculpture Garden, Other large city parks include Kildonan Park, St. Vital Park, and Fort Whyte Centre. The major commercial areas in the city are Polo Park (West End and St. James), Kildonan Crossing (Transcona and East Kildonan), South St. Vital, Garden City (West Kildonan) and the Corydon strip.