The northern part of the Outer Banks, from Oregon Inlet northward, is actually a part of the North American mainland, since the northern inlets of Bodie Island and Currituck Banks no longer exist. It is separated by the Currituck Sound and the Intracoastal Waterway, which passes through the Great Dismal Swamp occupying much of the mainland west of the Outer Banks. Road access to the northern Outer Banks is cut off between Sandbridge and Corolla, North Carolina, with communities such as Carova Beach accessible only by four-wheel drive vehicles. North Carolina State Highway 12 links most of the popular Outer Banks communities in this section of the coast. The easternmost point is Rodanthe Pier in Rodanthe, NC .