Explore Fort Jefferson & Dry Tortugas, FloridaA unique group of islands off the Florida Keys, this National Park is home to a pre-Civil War fort. Fort Jefferson is not only impressive, it's actually the largest brick structure in the Americas, with over 16 million blocks. Built between 1846 and 1875, the massive fort was never finished. But that doesn't make it any less incredible to behold, full of ornate masonry accents and upwards of 2,000 carefully constructed arches.
Hours -Sunrise to Sunset
Guided Tours -Hourly, starting at 11am