Belle Isle Park is Detroit's jewel, rich in history and natural beauty. Once known as Hog Island, now better named Bell Isle, is a picturesque island on the Detroit River, connected to the city by a small bridge. The entire island is now a park, and was designed by Frederick Law Olmsted, who also designed New York's Central Park. Albert Kahn, a renowned architect of the turn of the century, designed the Belle Isle Conservatory, which brings together native plants from across the country. The year-round complex includes a nature center, beaches, a water slide, tennis courts and playgrounds. Every June, the island hosts the Detroit Grand Prix. Officially, Belle Isle Park is a 982-acre park on the Detroit River, between the mainland United States and Canada. Owned by the City of Detroit, it is managed as a state park by the Michigan Department of Natural Resources on a 30-year lease that beganin 2013.