Assateague Island is a 37-mile (60 km) long barrier island located off the eastern coast of Delmarva. The northern two-thirds of the island is in Maryland while the southern third is in Virginia. The Maryland section contains the majority of Assateague Island National Seashore and Assateague State Park. The Virginia section contains Chincoteague National Wildlife Refuge and a small part of the national seashore. It is best known for its herds of feral horses, pristine beaches, and the Assateague Lighthouse. The island also contains numerous marshes, bays, and coves, including Toms Cove.