This national park was originally known as Fort Jefferson National Monument, since it contains a massive unfinished masonry fortress which served as a Civil War prison.
This national park was originally known as Fort Jefferson National Monument, since it contains a massive unfinished masonry fortress which served as a Civil War prison. FTP, name this park west of the Florida Keys, named for some islands which have a bunch of sea turtles.  
This national park was originally known as Fort Jefferson National Monument, since it contains a massive unfinished masonry fortress which served as a Civil War prison.
Dry Tortugas National Park