Dry Tortugas National Park
Dry Tortugas National Park is a national park of the United States located about 68 miles (109 km) west of Key West in the Gulf of Mexico, in the United States. The park preserves Fort Jefferson and the several Dry Tortugas islands, the westernmost and most isolated of the Florida Keys.
Source: Wikipedia — Dry Tortugas National Park (CC BY-SA 4.0)