Photo: Unknown photographer · Public domain · via Wikimedia Commons
Star fort · Dry Tortugas, Florida, United States
Fort JeffersonSuspected
- Dated
- Dated 1846–75; never finished
- Declared purpose
- Coastal fort
- Today
- Survives, national park
- Build time
- About 30 years, unfinished
- Region
- United States
- On the list as
- Suspected
Why it's on the list
About 16 million bricks on a remote coral island; its walls sink and crack into the foundations.
Hidden history
Found, Not Built
A hexagonal brick fort on a coral key 70 miles from Key West, never finished, with about 16 million bricks.
Why researchers flag it
About 16 million bricks on a remote coral island; its walls sink and crack into the foundations.
16 million bricks
On a remote island.
Settling
The walls have settled and cracked as the foundation sinks.
Never finished
Work stopped with the fort incomplete.
Questions worth asking
- How were the bricks delivered and laid here?
Possible original uses
- Fort
What the photos show
Sources
Further viewing
Episodes from My Lunch Break (Michael Kruse), the main lens for this app. They open on YouTube.












