Ang Thong National Marine Park is a stunning archipelago of 42 islands in the Gulf of Thailand, equidistant from Koh Samui and Koh Phangan, and one of the prime day trips from both islands. The park is best known for its turquoise lagoons, limestone cliffs, and panoramic viewpoints where scores of islands are strewn across the horizon. Most visitors take an organized tour that includes snorkeling, kayaking, and stops at scenic beaches and lookout points, such as Emerald Lake and Ko Wua Talap.
Getting to Ang Thong is straightforward: book a tour from Samui or Phangan, as independent access isn't possible. Tours differ, but many include lunch, snorkeling gear, and even a hotel pickup. Whether for photography, adventure, or a quiet island getaway, Ang Thong has a place in one of Thailand's most unforgettable marine encounters.