Main attractions of the park include the Long Meadow; the Picnic House; Litchfield Villa; Prospect Park Zoo; the Boathouse; Concert Grove; Brooklyn's only lake, covering ; and the Prospect Park Bandshell that hosts free outdoor concerts in the summertime. The park also has sports facilities, including the Prospect Park Tennis Center, basketball courts, baseball fields, soccer fields, and the New York Pétanque Club in the Parade Ground. There is also a private Society of Friends (Quaker) cemetery on Quaker Hill near the ball fields. In addition, Prospect Park is part of the Brooklyn-Queens Greenway, a network of green spaces that stretch across western Long Island.