The Florida Keys boast some of the most spectacular underwater adventures in the United States, where crystal-clear waters ...

Created in the early 1960s, this spectacular underwater park extends 3 miles ... chance to admire the biggest group of coral reefs in Florida and biodiversity of untold richness.

Four divers with $4,500 to spare can join the limited ranks of people who slept underwater inside Aquarius ... 60 feet deep in the Florida Keys National Marine Sanctuary, to study the ocean ...