Expert Guides and Planning Resources for Dry Tortugas National Park in Monroe County

Remote coral archipelago with the Western Hemisphere's largest brick fortress and the United States' only nesting colonies of several tropical bird species

Dry Tortugas National Park

Dry Tortugas National Park occupies a unique position in the American protected area system as a place where pristine tropical marine ecosystems coexist with profound historical artifacts spanning five centuries of maritime activity. The park sits at the terminus of the Florida Keys archipelago, projecting into the Gulf of Mexico in a configuration of low, sandy coral islands surrounded by productive reef systems. This isolation has paradoxically contributed to both ecological significance and historical preservation, as the difficulty of access has limited development and disturbance while creating natural hazards that generated numerous shipwrecks. The park's 64,701 acres encompass not only the seven named islands totaling roughly 144 acres of land but also extensive shallow reef systems, seagrass beds, and deep water environments that support remarkable biodiversity. Fort Jefferson dominates Garden Key, an unfinished massive coastal fortress that represents one of the most ambitious 19th-century American engineering projects and serves as thepark's most visible cultural landmark. The marine environment surrounding the islands contains reef formations representing the western extension of an arcuate chain of Pleistocene reef and oolitic limestone islands, with excellent examples of Holocene carbonate-sand deposits between the Tortugas and Key West. This combination of natural and cultural resources, both exceptionally preserved due to the park's remoteness, creates a destination unlike any other in the national park system.