The Ras Mohammed reefs and the Thistlegorm wreck, at the tip of the Sinai.
The Red Sea resort coast: dive boats to the Giftun islands and dolphins in the morning.
The Blue Hole, freediving on the Bedouin beach and Mount Sinai at sunrise an hour away.
Dazzling turquoise South Pacific lagoon.
Uninhabited island with crystal water.
Vast, remote Pacific lagoon.
Picture-perfect resort islands.
Laid-back "go slow" Caribbean island.
Seventeen kilometres of white sand and casuarina trees south of Mombasa, with kite-surfing and colobus monkeys in the trees.
Zanzibar’s liveliest beach, dhow builders and turquoise shallows.
Jungle island with 28 white beaches, glowing plankton at night and almost no roads, off Sihanoukville.
Jordan’s slice of the Red Sea: coral gardens, a sunken tank and the Cedar Pride wreck in warm, calm water.
Ras Mohammed’s coral walls and the Thistlegorm wreck, with visibility so clear the reef looks lit from within.
Vietnam’s beach resort capital — a long city beach, island snorkelling trips and Cham towers on the hill.
Laid-back pair of jungle islands with clear water and cheap beachfront snorkelling.
Granite-boulder islands in the Andaman Sea with some of Thailand’s clearest water and best coral.
Three tiny car-free islands off Lombok — turtles, reef bars and no traffic at all.
A sleepy Portuguese town, and Tofo beach with whale sharks and manta rays all year.
Four Mile Beach, reef boats and the Daintree, the quieter northern base for the reef.
Dhow trips to the Bazaruto archipelago, dugongs and dune islands in turquoise water.
The sea of seven colours, a Caribbean island closer to Nicaragua with Raizal English Creole culture.
Fifth Avenue, the ferry to Cozumel and the reef diving of the Riviera Maya.
Coral reefs on the Red Sea, the Underwater Observatory and the desert of Timna, at Israel's southern tip.
Island-hopping among the Bacuit lagoons of northern Palawan, limestone cliffs and turquoise water.
Sailing and whale-watching islands.
Quiet islands of beaches and history.
Powdery beach and vivid reef.
Praslin’s granite-boulder beach, often ranked among the world’s best.
Clear freshwater lake teeming with cichlids.
The world's longest freshwater lake.
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