Padre Island : description : Padre Island, the world's longest undeveloped barrier island, is a nesting ground for the Kemp's ridley sea turtle and a migratory site for Least Terns, Brown Pelicans, and Piping Plovers. Malaquite Beach provides a variety of recreational activities, and Novillo Line Camp has the remains of a cattle ranch. The military used part of the island as a bombing range during WWII.
Pare Island is the world's largest undeveloped barrier island.