There are six barrier islands along Mississippi’s Gulf Coast: Cat Island, Ship Island, Deer Island, Horn Island, Round Island and Petit Bois Island. They offer miles of pristine beaches and rich environments for people who love to spend time in nature or camp in unique places. Ship Island offers the most history of all the islands with seasonal fort tours focused on its incredible past. Horn Island is the locals’ favorite. This is where you go to see alligators, pelicans and other wildlife.