Fort Jefferson

The fort takes up an entire island. The bricks and lumber came from Pensacola, 500 miles away. The cement and stone came from New York, 1,500 miles away. The concrete foundation is 14 feet wide and a mile long, built Below Sea Level! You can walk the moat wall all the way around the fort. A moat to protect against attack and against the weather. Bastions from which they can protect the walls.

The fort was built for 400 cannons, and designed so 125 of them could simultaneously work the same target. No square corners.

A burrowing owl has adopted the fort, living in the remains of the main powder magazine. He’s in this picture.