Seashore of Johnson Beach in the Perdido Key Area of the Gulf Islands National Seashore. Gulf Islands National Seashore offers recreation opportunities and preserves natural and historic resources along the Gulf of Mexico barrier islands of Florida and Mississippi. Some islands along the Alabama coast were originally considered for inclusion, but none is part of the National Seashore. The protected regions include mainland areas and parts of seven islands. The color of the sand in the region is exceptionally white. The Florida District of the seashore features offshore barrier islands with sparkling white quartz sand beaches (along miles of undeveloped land), historic fortifications, and nature trails. Mainland features near Pensacola, Florida, include the Naval Live Oaks Reservation, beaches, and military forts. All Florida areas are accessible by automobile. The Mississippi District of the seashore features natural beaches, historic sites, wildlife sanctuaries, islands accessible only by boat, bayous, nature trails, picnic areas, and campgrounds. The Davis Bayou Area is the only portion of the National Seashore in Mississippi that is accessible by automobile. Petit Bois, Horn, East Ship, West Ship (location of Fort Massachusetts), and Cat islands are accessible only by boat. The 4,080 acres Gulf Islands Wilderness offers special protection, within the seashore, to parts of Petit Bois Island and Horn Island, Mississippi. Four visitor centers, staffed by National Park personnel, are located within Gulf Islands National Seashore.—Wikipedia