Snorkel at Yap

Oceanic island off Borneo ranked among the best dive sites on Earth — turtles, barracuda tornadoes, reef sharks.

Granite-boulder islands in the Andaman Sea with some of Thailand’s clearest water and best coral.

The planet's richest coral reefs.

Current-swept island reefs at the mouth of the Red Sea.

World-class reef diving off Roatan.

Untouched Red Sea reefs and islands.

Some of the world's richest reef waters.

Dazzling turquoise South Pacific lagoon.