Neptune Island is an island in Long Island Sound and part of the City of New Rochelle, New York. It is connected to the mainland by a stone causeway topped by Neptune Road. A dam at the peninsula's east end creates a small pond, and its west shore edges the Neptune Basin inlet.

Glen Island Park is a 105-acre (0.42 km2) waterfront park, located on Glen Island, on the Long Island Sound, New York. The park is owned and operated by Westchester County and shares the island with a privately operated but county-owned entertainment facility, the Glen Island Harbour Club. The Glen Island Casino was a springboard to success during the 1930s Big Band Era, including that of Ozzie Nelson, Charlie Barnet, Claude Thornhill, Les Brown, The Dorsey Brothers and Glenn Miller. Westchester County residency is required for parking and beach access.