Dry Tortugas National Park
We knock another national park off of our list after a 70 mile 2.5 hour boat ride almost due west from Key West out into the Gulf of Mexico. The park is basically a large abandoned fort, sitting on a very small island, surrounded by crystal blue waters, with some nice snorkeling spots right off the beaches. It is a very unique place, and the boat ride, on a Coast Guard cutter, is a very well run and pleasant experience too.