Hundreds of mantas feed in this tiny bay during the monsoon plankton blooms.
Shark dives in a vast lagoon.
World-class reef diving off Roatan.
Turtle-rich reefs off Moheli.
Dive with whale sharks and mantas.
Reefs Cousteau chose for his underwater village, with hammerheads at Sha’ab Rumi and almost no other divers.
Current-swept island reefs at the mouth of the Red Sea.
Cave reef made famous by James Bond.
The largest reef in the northern hemisphere: nurse sharks and rays at Hol Chan, turtles and 500 species of fish.
Plunge into a deep ocean sinkhole off Andros.
Jordan’s slice of the Red Sea: coral gardens, a sunken tank and the Cedar Pride wreck in warm, calm water.
Clear Caribbean sinkholes and reef right off the shore at Playa Giron.
A Japanese fleet sunk in 1944 lies in shallow, clear water — a dozen wrecks divers can swim through.
Ras Mohammed’s coral walls and the Thistlegorm wreck, with visibility so clear the reef looks lit from within.
Oceanic island off Borneo ranked among the best dive sites on Earth — turtles, barracuda tornadoes, reef sharks.
The planet's richest coral reefs.
Granite-boulder islands in the Andaman Sea with some of Thailand’s clearest water and best coral.
Drift between the American and Eurasian tectonic plates in gin-clear glacial water.
Fringing reef in Western Australia where whale sharks cruise close to shore.
Infobox
