Covering approximately 45 square miles on North Carolina's Outer Banks, Cape Hatteras National Seashore is the most extensive stretch of undeveloped seashore on the Atlantic coast. The national recreation area includes Oracoke and Hatteras islands and part of Bodie Island. The islands are connected by a free bridge and a free ferry. Vast expanses of sand and water are the main attractions here; bottle-nose dolphin are sometimes seen near the beach. Visitors should park in designated areas and only leave the road where indicated; day-use facilities are at Coquina Beach, Cape Point and Oracoke.