Parks in Greater St. Louis are administered by a variety of state, county, and municipal authorities. The region also is home to Gateway Arch National Park, site of the Gateway Arch, the only National Memorial in the state of Missouri. Among the largest municipal parks is Forest Park, which is 1,293 acres (5.2 km2) and is located in the city of St. Louis, although both Greensfelder County Park and Creve Coeur Park in St. Louis County are larger, at 1,646 and 2,114 acres (6.7 and 8.6 km2) respectively. St. Louis County is also the location of two large state parks, Babler State Park with 3.8 square miles (9.8 km2) and Castlewood State Park with 2.8 square miles (7.3 km2). The largest state park in the region is Meramec State Park, located near Sullivan, Missouri, with 10.8 square miles (28 km2) of parkland.