The name means Archipelago of the Golden Bowl, and the many karst islands of this marine park are within day-tripping distance of both Ko Samui and Ko Phangan in the southern Gulf.

Highlights include a lagoon of glass-like emerald water on Ko Mae Ko, and a viewpoint on Ko Wua Talap that offers arguably the finest views found anywhere in Thailand's islands. Most day tours include snorkelling and/or kayaking.

Though it's left off most tour itineraries, Ko Phaluai is the archipelago's largest island. You can get there on a ferry from Don Sak on the mainland, and stay at a homestay or a small resort. Staff can arrange boat tours to other parts of the park, but be prepared for a language barrier as Ko Phaluai is mostly visited by Thai tourists.