United States · 19th century
Fort Jefferson is a former U.S. military coastal fortress in the Dry Tortugas National Park of Florida. It is the largest brick masonry structure in the Americas, covering 16 acres (6.5 ha) and constructed of over 16 million bricks. Among United States forts, only Fort Monroe in Virginia and Fort Adams in Rhode Island are larger. The fort is located on Garden Key in the lower Florida Keys within the Dry Tortugas, 68 miles (109 km) west of the island of Key West. The Dry Tortugas are part of Monroe County in Florida.
The fort was named for the Founding Father and American president Thomas Jefferson.
Text adapted from “Fort Jefferson” on Wikipedia, CC BY-SA 4.0.
Fort Jefferson ranks #1,179 of 9,079 worldwide in the atlas's castle fame ranking, and #18 of the 110 mapped in United States. Founded 1847, it is older than 8% of the atlas's dated landmarks — one of 717 atlas entries founded in the 19th century. Its Wikipedia articles were opened 11,540 times in the last 60 days, more than 95% of the atlas. See how United States compares in the castle statistics.
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