At Biscayne National Park has some of the best and untouched reefs in South Florida! Snorkeling trips leave daily from the National Parks visitor center. Ride the Boca Chita to the differant reefs and shallow water wrecks like the Mandalay which sank in 1966 on Long Reef. Visit our web site Biscayneunderwater.com or call 305-230-1100 extension 402 to make reservations. The boat leave at 10 am and 1:30 pm.