Visit Cas Abao beach

Uninhabited island with crystal water.

Crystal coastal swimming pools.

Praslin’s granite-boulder beach, often ranked among the world’s best.

Famed white-sand beach on Culebra.

Coral dive site of mushroom-shaped formations.

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.