Silent World Dive Center, Key Largo

When you're on the cusp of North America's only living coral reef, you don't want to squander the opportunity. So, Silent World Dive Center pulls out all the stops: they handle certification courses, equipment rental and repair, and daily excursions out into the briny deep. Their team consists of certified dive professionals, each of whom is well acquainted with the best spots for encountering wildlife and the most complex verb conjugations of the Glub Glub language.

Silent World's United States Coast Guard inspected vessel makes regular stops at the Florida Keys National Marine Sanctuary and John Pennekamp Coral Reef State Park. There, groups of up to 12 divers can explore beautiful reef formations and their accompanying fauna. Other trips take experienced divers to the wrecks and artificial reefs of the Keys, including the sunken LSD-32 Spiegel Grove, where gigantic goliath grouper roam.