This park protects seven small islands 70 miles west of Key West, Florida, and the ocean waters that surround them. These islands change constantly from the effects of tides, weather, air, and other environmental and human factors. On Garden Key, visitors can tour the largest all-masonry fort in the United States, built between 1846 and 1875 to defend the Gulf of Mexico, but never completed. The park is also renowned for its vibrant coral, lush seagrass, and migratory birds.


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