Dauphin Island is Mobiles beach. Listed as a barrier island, locals and tourists alike flock to the island for fun in the sun, and to get away from the city. a local favorite ever since it was discovered, come see historic Alabama, as much of the wooded portions of the island are untouched. If the beach isn't enough, visit Fort Gaines on the island. The fort was used to help protect Mobile, and was its first line of naval defense.