Sand Island Park Main St & River St, Bethlehem, PA18018 Situated just minutes from both the north and south side of downtown, between the Lehigh River and the historic Lehigh…More Canal, Sand Island Park offers a wide variety of facilities for varied interests. Lighted tennis and basketball courts are among its featured attractions. It also has playground equipment, walking and biking paths, a boat launch and a splendid view of South Mountain. The island is also home to the Charles A. Brown Ice House, an indoor performance venue and a former ice factory for city residents.