The Detroit Zoo is located about 2 miles (3.2 km) north of the Detroit city limits at the intersection of Woodward Avenue, 10 Mile Road, and Interstate 696 in Royal Oak and Huntington Woods, Michigan, United States. The Detroit Zoological Society (DZS), a non-profit organization, operates both the Detroit Zoo and the Belle Isle Nature Zoo, located in the city of Detroit. The Detroit Zoo is one of Michigan's largest family attractions, hosting more than 1.4 million visitors annually. Situated on 125 acres of naturalistic exhibits, it provides a natural habitat for more than 3,300 animals representing 280 species. The Detroit Zoo was the first zoo in the United States to use barless exhibits extensively.