Spend a full day exploring Angthong Marine Park from Koh Samui: limestone islands, the Emerald Lake and secluded beaches. This practical guide covers what to expect on the 10‑hour cruise and how to prepare.
More ways to explore the area's outdoor wonders
The boat slips away from Koh Samui as the shoreline thins into open water and the first karst towers rise like vertical islands from the sea. Salt spray and warm wind cut across the deck; the guide points toward a cluster of jagged limestone spires—Angthong Marine Park—and the day opens into blue water, hidden coves and a freshwater emerald lagoon tucked inside a collapsed caldera.
Difficulty
easy
Duration
10 hours
Fitness Level
Suitable for most fitness levels; involves short swims and light walking on sand and rock; no sustained hiking required.
Wildlife
History
Angthong was declared a national marine park in 1980 to protect its islands and marine habitats; the islands have no permanent residents and were historically used by local fishermen.
Conservation
Visitors are asked to avoid touching coral, use reef‑safe sunscreen, and take all trash off the islands to protect fragile marine ecosystems.
Reserve your spot on the Full-Day Angthong Discovery Cruise from Koh Samui today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Bring reef‑safe sunscreen
Protect coral and your skin—choose a reef‑safe SPF and reapply after swimming.
Wear water shoes
Landings can be rocky; shoes with good traction make getting on and off boats and beaches safer.
Hydrate and pack snacks
Although meals and drinks are provided, bring a refillable bottle to stay hydrated in tropical heat.
Secure belongings for camera shots
Expect spray and wind on deck—use a dry bag or waterproof case for cameras and phones.
Reef‑safe sunscreen
Protects skin while minimizing harm to coral and marine life.
summer
Water shoes
Helps with rocky shore entries and slippery boat ramps.
Light waterproof daypack or dry bag
Keeps gear dry during boat transfers and beach stops.
Wide‑brim hat and polarized sunglasses
Reduces glare and sun exposure on open water.
summer