Padre Island National Seashore separates the Gulf of Mexico from the Laguna Madre, one of a few hypersaline lagoons in the world.  The park protects 70 miles of coastline, dunes, prairies, and wind tidal flats teeming with life.  It is a safe nesting ground for the Kemp's ridley sea turtle and a haven for 380 bird species.  It also has a rich history, including the Spanish shipwrecks of 1554.