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This site is about 70 miles west of Key West, Florida and requires a boat or sea plane; hence, the 5 difficulty rating.
This cache is located in Fort Jefferson on Garden Key in the Dry Tortugas. The fort was constructed with over 16,000,000 bricks in the mid 1800's as America's largest coastal fort, but was never completed. During the Civil War, it served as a prison for deserters and later held the 4 men convicted of complicity in President Abraham Lincoln's assassination, most notedly Dr. Samuel Mudd.
Today, the fort is in the care of the National Park Service and offers some of the finest snorkeling opportunities in North America. Also, bird watchers can spot as many as 200 species that migrate through the islands or call them home.
E-mail your answer the the question below to me. Do not post it here, even if encrypted.
To log this find, visit one of America's most unique and remote parks, go to the coordinates listed and e-mail me the name/use of the building that stands before you.
(No hints available.)
Last Updated: on 11/15/2017 3:57:44 PM (UTC-08:00) Pacific Time (US & Canada) (11:57 PM GMT)
Coordinates are in the WGS84 datum