Snorkel at Anse Lazio

Bike to famous granite-boulder beaches.

Powdery beach and vivid reef.

Famed white-sand beach on Culebra.

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.

Bangka boat trips between limestone lagoons, hidden beaches and the Big and Small Lagoon of Bacuit Bay.

Coral islands and old Swahili towns.