Cross the Gulf of Thailand to Ang Thong’s 42-island archipelago for snorkeling, a climb to a sweeping viewpoint on Wua Ta Lap, and time at the emerald lagoon — a full-day marine escape from Koh Samui.
More ways to explore the area's outdoor wonders
A warm salt breeze hits the bow as the big boat cuts away from Koh Samui, the island shrinking into a coin of green. After an 80-minute crossing through glassy blue water, the archipelago of Ang Thong reveals itself: low limestone islets, sheer cliffs, and the bright eye of the Emerald Lagoon. You step ashore on Wua Ta Lap, where a steep, well-built trail and wooden steps take 15–30 minutes to reach a broad viewpoint that opens across the park — a panoramic bowl of islands and sea.
Difficulty
moderate
Duration
7–8 hours
Fitness Level
Light to moderate fitness: able to climb uneven wooden steps and move around a boat for several hours; basic swimming ability recommended.
Wildlife
History
Declared a national marine park in 1980, Ang Thong’s islands were long used by local fishers and now form a protected marine and coastal landscape.
Conservation
The park enforces regulated visitor access and mooring to protect coral and seabeds; use reef‑safe products and avoid touching marine life to minimize impact.
Reserve your spot on the Angthong Marine Park Full-Day Big Boat Economy Tour today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Bring reef‑safe sunscreen
Use a high‑SPF, reef‑safe formula and reapply after swimming to protect coral and your skin.
Water shoes for shore entries
Rocky landings and coral patches make sturdy water shoes useful for beach and snorkeling entry/exit.
Morning calm is best
Book early departures when seas are usually calmer for smoother crossings and clearer snorkeling.
Secure valuables in a dry bag
Large sun decks and dinghy transfers can splash; keep phones and wallets sealed and stashed.
Reef‑safe sunscreen
Protects skin and the marine environment during prolonged sun exposure and swimming.
summer
Water shoes
Protects feet on rocky shore entries and slippery wooden walkways.
summer
Light daypack or dry bag
Keeps spare clothes, electronics, and valuables dry during dinghy transfers.
summer
Reusable water bottle
Top up with provided bottled water to stay hydrated through the hot day.
summer