Snorkel Champagne Reef

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.

Ras Mohammed’s coral walls and the Thistlegorm wreck, with visibility so clear the reef looks lit from within.

Jordan’s slice of the Red Sea: coral gardens, a sunken tank and the Cedar Pride wreck in warm, calm water.

Turtle-rich reefs off Moheli.

Coral-rich bay of huge marine diversity.

Dazzling turquoise South Pacific lagoon.