Fort Jefferson in the Dry Tortugas
An old photograph of the wonderful Fort Jefferson in the Dry Tortugas National Park, 70 miles west of Key West, Florida. This photo was taken from atop of the 50 foot tall wall around the fort. Read all about it's fantastic story at en.wikipedia.org/wiki/Fort_Jefferson,_Florida
It is the largest masonry structure in the Western Hemisphere, and is composed of over 16 million bricks.