Private 4 Islands Tour Ko Lanta: Emerald Cave by Longtail Boat

Swim through an underwater tunnel into a hidden lagoon ringed by limestone cliffs.

A private longtail boat tour from Ko Lanta takes groups of 1 to 15 to four islands (Koh Mah, Koh Chuak, Koh Ngai, and Koh Mook) over seven hours. You set the pace and stops. The centerpiece is Emerald Cave, where you swim through an underwater passage to reach a secret lagoon and beach inside the cave. Snorkeling happens in coral reefs with abundant marine life, and lunch is Thai food with seasonal fruit.

Step-by-step itinerary

Explore 4 islands by private boat

• Visit Koh Mah island
• Visit Koh Chuak island
• Swim through Emerald Cave tunnel
• Explore secret lagoon and beach

The experience

A private charter means no fixed schedule and no group you didn't choose. You decide which islands to visit, how long to stay at each one, and whether to spend more time snorkeling or exploring. The boat leaves from your hotel and returns there, so the day starts and ends on your terms. The four islands (Koh Mah with its clear water and jungle wildlife, Koh Chuak with low-key beaches and caves, Koh Ngai, and Koh Mook) each offer different water activities and scenery, and a private boat lets you skip the crowded spots.

Emerald Cave is the draw. To reach the lagoon inside, you swim into an underwater tunnel roughly 80 meters long, then surface in a hidden chamber with a sandy beach and limestone walls. The snorkeling happens in coral reefs between islands, where the marine life is abundant. Lunch is Thai food with fresh seasonal fruit, and you get drinking water throughout the day.

The boat comes with life jackets, snorkeling masks, and a first aid kit. Hotel transfer is included, so you don't arrange transport to the pier. The tour runs seven hours. A national park fee (200 baht per adult, free for children) is paid separately at the site.

What’s included

• Life jacket and snorkeling mask.
• Thai lunch with seasonal fruit and drinking water.
• hotel pickup and drop-off.
• accident insurance.

Options for this experience

4 options

For 1-2 PersonUp to 2 per booking · 09:00Lasts 7 hours; includes pickup

For 3-5 PersonUp to 5 per booking · 09:00Lasts 7 hours; includes pickup

For 6-10 PersonUp to 10 per booking · 09:00Lasts 7 hours; includes pickup

For 11-15 PersonUp to 15 per booking · 09:00Lasts 7 hours; includes pickup

You'll see the exact price of each option when you check availability.See dates and prices

Before you book

Days and timesEvery dayDeparts at 09:00

Book up to10h before

GroupPrivate

Meeting point and pickupHotel pickup is optional; you can also go straight to the meeting point. Ends back at the starting point.

Cancellation and refundsFree cancellation up to 24 h before the start. After that, no refund.It may be canceled due to bad weather or if the minimum number of travelers isn't reached. If that happens, you're offered another date or a refund.

Prices and times updated yesterday

Good to know

Low physical effortPublic transport nearbyNot recommended during pregnancyNot recommended with heart problemsNot recommended with back problems

Operated by Oh-Hoo

Is this one for you?Book this if your group wants to control the day's rhythm and stops. A private boat suits families or friends traveling together who'd rather skip the crowded shared tours and spend extra time at whichever island appeals most, whether that's longer at Emerald Cave or more snorkeling in the reefs.

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Top questions

What happens if it rains?

It may be canceled due to bad weather. If that happens, you're offered another date or a refund. Free cancellation up to 24 h before the start.

What is Emerald Cave and how do you get inside it?

Emerald Cave is a hidden lagoon inside a limestone cave on Koh Mook. You reach it by swimming through an underwater tunnel about 80 meters long. Once you surface inside, you find a secret beach and sandy floor surrounded by cliff walls.

Can you choose which islands to visit on the private tour?

Yes. Because it's a private charter, you set the itinerary and pace. The four islands are Koh Mah, Koh Chuak, Koh Ngai, and Koh Mook, and you decide how long to spend at each one and which activities to prioritize.

What's included in the boat tour from Ko Lanta?

The tour includes snorkeling gear, life jacket, Thai lunch with seasonal fruit, drinking water, hotel pickup and drop-off, and accident insurance. A national park fee is paid separately at the site.

How long does the tour last?

The tour runs seven hours from hotel pickup to drop-off.

Is snorkeling part of the tour?

Yes. You snorkel in coral reefs between the islands, where there's abundant marine life. Snorkeling masks are provided, and the reefs are visited as part of the island-hopping route.