One-Day Trip to 4 Iconic Islands by Longtail Boat from Koh Lanta

Swim through the Emerald Cave on Koh Mook

Discover the iconic 4 islands in the south-east of Koh Lanta on board the traditional longtail boat with stops at Koh Chuek, Koh Mook, Koh Ngai and Koh Maa. Experience the best places to snorkel with crystal clear water and varieties of underwater coral reefs, sea creatures and colorful anemone fishes. The highlight is a swim through the 85m cave tunnel at Koh Mook which leads into the amazing inner lagoon with a secret beach.
One-Day Trip to 4 Iconic Islands by Longtail Boat from Koh Lanta
Available

Highlights

  • Island hopping by iconic longtail boat
  • Swim through the Emerald Cave on Koh Mook
  • Snorkel on the reef of the small karst island of Koh Chueak
  • Enjoy lunch and have some beach time on Koh Ngai
  • Spot giant bats and feed fish at Koh Maa

What to expect

On this one-day trip you will discover 4 iconic islands in the south-east of Koh Lanta. Get picked up from your hotel and head to the pier in Lanta Old Town. Board the traditional longtail boat with an English speaking guide and depart to the 4 Islands.

You will arrive at the first snorkel spot after a ride of approximately 45 minutes. Swim in the crystal clear water of Koh Chueak, a small karst islet with sea caves and small sandy beaches between Koh Mook and Koh Ngai.

Around an hour later visit Koh Mook, the largest island on this tour. It is best known for its Tham Morakot (which means Emerald Cave in Thai) and blue lagoon with a secret beach in the center of the island. The entrance to the cave is located on the western side of the island and is only accessible during low tide. The cave itself winds for about 80 meters to its other exit, onto a white beach with an emerald pool surrounded by steep cliffs.

Continue to Koh Ngai to enjoy a delicious Thai picnic lunch on the beach, consisting of steam rice, fried mix vegetables, Massaman Curry with chicken and seasonal fruits. Koh Ngai is a charming island that features a dramatic interior and a spotless sandy beach along its eastern coast. Mountainous and covered by tropical forest, the island is surrounded by clear waters with magnificent corals, making it a perfect site for snorkeling.

Cruise further to the 2nd snorkel stop at Koh Maa where you can feed the fish with bread or bananas. Thousands of giant bats can also be seen here.

Head back from Koh Maa to Koh Lanta and arrive at the port in the old town at approx. 15.30. Get transferred back to your hotel on Koh Lanta.

This trip is for everyone who loves water activities and is not afraid to swim through a cave in perfect darkness for about 80 metres!

Itinerary

  • 07:45 - 08:30: Hotel pickup on Koh Lanta
  • 08:30 - 08:45: Meet the crew at Lanta Old Town Pier
  • 08:45 - 09:00: Safety check and get instructions
  • 09:00 - 09:45: Cruise by longtail boat to the 4 Islands
  • 09:45 - 11:00: Snorkel and feed fish at Koh Chueak
  • 11:00 - 12:00: Swim through Emerald Cave into the hidden lagoon on Koh Mook
  • 12:00 - 13:00: Lunch at the beach at Koh Ngai
  • 13:00 - 13:30: Free time for sightseeing the inner of the island
  • 13:30 - 14:30: Open water snorkeling at Koh Maa
  • 14:30 - 15:30: Head back to Koh Lanta
  • 15:30 - 16:00: Transfer back to the hotel
  • * The tour program is subject to change due to weather & sea conditions

Inclusions

  • Hotel round-trip transfer
  • Drinking water, soft drink & seasonal fruits
  • Thai buffet lunch on the beach at Koh Ngai
  • Snorkeling equipment
  • Life jacket
  • Professional English-speaking guide
  • Basic travel accident insurance (covers injuries sustained only during the trip. It does not cover treatment for pre-existing medical conditions)

Important Information

  • Bring a towel, waterproof bag, swimwear, sunscreen, sun hat, sunglasses, flip flops and camera.
  • The itinerary is subject to minor adjustments during the low season (May to October) because of monsoon weather and sea conditions, and visits to Koh Chuek are suspended.
  • Wear flip flops or water shoes in case there are shells or rocks on the sand and shorts rather than pants as the water level may be above the knees when hopping off/on the boat.
  • This tour is not recommended for pregnant women, infants under 2 years or people with back or neck problems.
  • There is a minimum of 10 people required to run this activity! On the rare occasion that we should be required to cancel this trip, we will inform you in advance and offer a different travel date, an alternative activity or provide a full refund.

Reserve your spot

Available

Foreigners

Adults (12+)
Children (4-11)
Infants (2-3)

Thai Nationals

Adults (12+)
Children (4-11)
Infants (2-3)
Starting location *

Price Breakdown

Activity price
Adults 0 × 1,000.00 THB
0.00 THB
Total price 0.00 THB
  • To guarantee a booking, book no later than 15 hours before the scheduled departure time.
  • During high season (November - April) and on National Holidays, book as early as possible as seats sell out fast.
  • Due to bad weather or sea conditions, the tour may be postponed or cancelled with a full refund.
  • You can cancel up to 24 hours prior to departure date and receive a refund (minus payment fees). Read our Terms & Conditions.

Activity Details

  • Availability
  • Schedule
    09:00 - 16:00
  • Duration
    7.0 hours
  • Means of transport
    Traditional longtail boat
  • Guidance
    Professional English speaking tour guide
  • Group size
    10 - 25 people

National Park Entrance Fee

There is an entrance fee for 'Hat Chao Mai National Park' of 200 THB per adult and 100 THB per child to be paid. These fees help rangers keep the park protected and clean.

You can choose to pay the fees now or on the day of the trip.

Places of Interest

Last updated: 11.08.2026 at 02:33
Total 0.00 THB
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