See the Underwater World of Florida. The 1,700 islands that compose the Florida Keys stretch for 150 miles from Miami to the Sunshine State's southernmost tip, bordering the only living barrier reef on the continent. The clear, calm seas, diverse marine life, brilliant coral ridges, and as many as 5,000 shipwrecks make for a diving enthusiast's dreamland—but don't let Florida's flagship scuba and snorkeling destination overshadow the state's copious spring dive sites. The near-perfect visibility of John Pennekamp Coral Reef State Park, the nation's first underwater preserve, makes Key Largo the most popular diving and snorkeling destination in the United States. The National Marine Sanctuary Stretches the full length of the islands. But if you're anxious to find a diving experience different from the crowded Keys, Florida's porous limestone terrain, particularly across the central region and the Panhandle, has created more divable springs than any other state in the nation. < Back to Things To Do