2. Dry Tortugas National Park – Florida

Seventy miles west of Key West, Dry Tortugas National Park feels more Caribbean than continental United States. Accessible only by boat or seaplane, this remote cluster of islands offers turquoise waters, coral reefs, and the imposing 19th-century Fort Jefferson.

The isolation is part of the magic. With no cars, no crowds, and minimal development, the experience feels raw and immersive. Snorkelers find vibrant marine life just offshore, while history enthusiasts explore the massive brick fort surrounded by open ocean.

Despite being in Florida, many Americans have never heard of Dry Tortugas. Its remoteness keeps it off typical travel itineraries, but those who make the effort often describe it as unforgettable.