Ang Thong National Marine Park from Koh Samui

Ang Thong National Marine Park near Koh Samui, Thailand

A short boat ride from Koh Samui lies one of the Gulf of Thailand’s great natural wonders: the Ang Thong National Marine Park. This archipelago of more than forty limestone islands rises sheer from emerald water, sheltering hidden lagoons, white-sand beaches and dramatic viewpoints. A day trip here is the perfect counterpoint to Samui’s busier beaches, swapping resorts for raw, protected wilderness.

A Protected Island Wonderland

Ang Thong, meaning “golden bowl,” is a marine national park of jungle-clad limestone islands scattered across the Gulf. Largely uninhabited, it is a haven for wildlife and pristine scenery. The park’s most famous sight is the emerald inland lagoon on Koh Mae Ko, a saltwater lake hidden within the cliffs and reached by a steep climb.

Activities and Highlights

Day trips typically combine kayaking through sea caves and around the islands, snorkelling in clear bays, hiking to the iconic viewpoint above the lagoon, and relaxing on quiet beaches. Kayaking is especially rewarding, letting you explore hidden corners and arches at your own pace amid spectacular surroundings.

Planning Your Trip

Tours depart Koh Samui by speedboat or larger boat, with speedboats reaching the park faster and leaving more time to explore. The park is usually closed during the stormiest months, so check seasonal conditions. Bring water, sun protection, swimwear and shoes suitable for the rocky climb to the viewpoint.

Wild, scenic and unforgettable, Ang Thong Marine Park is the standout natural day trip from Koh Samui and a highlight of the Gulf coast.