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World's Most Secret Islands
Isolated from its neighbor Key West, which lies about 70 miles to the east, is the national park of Dry Tortugas. Featuring some of the most vibrant coral reefs in Florida, this park is a marine enthusiast's dream, with teal waters for top-notch scuba diving, snorkeling and deep-sea fishing. The park is accessible only via seaplane or boat, both of which whisk only about 60,000 visitors to Dry Tortugas each year.
Joe Parks / Flickr)