Ang Thong National Marine Park

Ang Thong National Marine Park, just northwest of Ko Samui, is a protected archipelago of 42 limestone islands known for dramatic cliffs, hidden lagoons, and clear waters. Popular as a day trip, it offers kayaking, snorkeling, short hikes, and viewpoints over the emerald-green sea. One of its best-known sights is Emerald Lake, a saltwater lagoon enclosed by steep rock walls. Visitors looking for a scenic escape from Samui’s beaches will find a mix of natural beauty, light adventure, and relatively unspoiled coastal landscapes.