Fort Jefferson Trail

This is less a hike and more a time-travel stroll around the largest masonry structure in the Americas, surrounded by water so blue it looks photoshopped. You'll walk the moat wall and ramparts of Fort Jefferson, a massive Civil War-era fortress planted on a tiny island seventy miles from Key West. The path is flat and fully exposed — think sun-baked brick and coral, not dirt trail — with views of endless turquoise in every direction. Peer into old cannon ports, explore the prison cells where Dr. Samuel Mudd was held for treating John Wilkes Booth's broken leg, and watch sea turtles surface in the moat below. The whole loop feels like walking through a history documentary with a Caribbean backdrop. Perfect for anyone who loves the intersection of wild places and human stories, or who just wants to say they hiked on a fort in the middle of the ocean.