Called ‘dry’ because they lack fresh surface water, this national park is actually a series of seven small islands located 70 miles west of Key West, Florida. Its focal point is the immense Fort Jefferson, the largest masonry structure in the Western hemisphere, built in the 19th century.
Most of Dry Tortugas’ attraction, however, is in the water that makes up 99 percent of the park’s official area. Swimming, snorkelling, and diving will reveal spectacular coral reefs, shipwrecks, diverse marine life, and birds. Camping is available on the same island as the Fort. Islands are accessible by boat or seaplane.