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This extremely popular tour in a one-day package is designed to admire and explore the four most famous islands of Lanta (Koh Mah, Koh Cheak, Koh Ngai, and Koh Mook). Explore and visit the Emerald cave (Unseen in Thailand). Enjoy snorkeling and sightseeing with an abundance of marine life in the coral reef. Enjoy swimming in the crystal clear water with a beautiful beach and spend more time relaxing. Discover a beautiful sea with a lot of clownfish (Nemo Fish) and aquatic animals. Enjoy lunch, free time for relaxing, and sunbathing on the beach. Hassle-free pickup and drop-off from your Lanta hotel.
Not recommended for travelers with spinal injuries
Not recommended for travelers with poor cardiovascular health
Not recommended for pregnant travelers
Public transportation options are available nearby
Suitable for all physical fitness levels
Child ticket age between 4-11 years.
On the rare occasion that we should be required to cancel a tour, we will inform you in advance and offer a different tour date, an alternative tour or provide a full refund
Guests who are pregnant or have high blood pressure, heart disease and bone diseases are not recommended to join the tour
For a full refund, cancel at least 24 hours before the scheduled departure time.
Ko Ngai
Compact island with clear water for diving, white-sand beaches & jungle surrounds with wildlife.
Ko Muk
Offshore island & day-trip destination featuring low-key beaches, caves & water activities.
First Aid Kit
Life jacket, Snorkeling mask
Lunch, Drinking water, Fruit
Hotel Transfer
Tour Guide
Accident Insurance
National park fee (200THB per adult and 100THB per child) to be paid at point of entry
Select a pickup point
Duration: 8 hours
Departure time: 09:00am
Pick up Time: 08:00am - 08:50am
Pickup included
Duration: 8 hours
Departure time : 09:00am
Pick up Time : 08:00am – 08:50am
Pickup included
41 reviews
Total reviews and rating from Viator & Tripadvisor
Elin B,,Nov 10, 2025
- Review from Viator
The sea was WAY too choppy to be travelling out in. It was not safe, half of the people on the boat were throwing up from sea sickness and another person had a panic attack. They took us everywhere anyway. The sea at Emerald Cave did not look safe at all to swim in, even for a strong swimmer. The drivers spoke limited English so you didn't really know where you were going, how long you were there for, or any other safety instructions. There were not enough life jackets for everyone. On my life jacket, only one of the clips worked. Safety is not a priority and it's a death trap. Lots of waiting around at the start before you get on a boat (45 mins - 1 hr!)
brentw828,,Sep 1, 2025
- Review from Tripadvisor
Great guide ensuring no one was left behind. We even brought bake some people that were left behind from another company. Conditions got a bit rough at the end and there are alot of company's doing the same thing. But It is impressive on how everyone works together in tough conditions.

TimSmith55,,Mar 22, 2025
- Review from Tripadvisor
The four islands tour is very good. We recommend that you choose a tour with the Emerald Cave. It is stunning. Please note that you have to swim 100m through dark cave before reaching centre.




AlasdairC42,,Mar 14, 2025
- Review from Tripadvisor
Excellent host & fantastic day. Only reason for 4/5 is the swim to the Emerald Cove. Guide dealing with a non swimmer and swam ahead with fins. It was pitch black without his torch and once he rounded a bend it was black and very difficult to avoid crashing into a wall - that was quite painful. Nice sized group of great individuals. Food lovely and guide was great
Jo F Riches,,Feb 21, 2025
- Review from Tripadvisor
Great trip and very good value. Fish in the stops are beautiful even if the coral is pale, lunch was excellent and was great to Visit the other islands for future stay homework!




Coby v,,Feb 19, 2025
- Review from Tripadvisor
Beautiful trip, where especially the visit to the Emerald Cave was a highlight. Beach at Koh Ngai was disappointing, was very narrow due to high tide. Many different fish when snorkeling. Unfortunately, the coral is dying due to climate change.
189maruskag,,Feb 9, 2025
- Review from Tripadvisor
We had absolutely amazing snorkelling in two different locations, and saw a wonderful array of colourful fish and corals. But sadly a visit into the emerald cave was not possible due to the presence of small but stingy jellyfish, which can’t be helped. However we could maybe have been offered another snorkelling or swimming stop, but instead spent an extra long time on the island where we had lunch. However here the waters were very shallow and full of tourist boats, making an after lunch swim less than enjoyable. Also, whilst we certainly don’t expect a perfect grasp of the English language, I do think anyone working as a guide needs a good enough grasp to enable basic communication.
Siiri M,,Jan 19, 2025
- Review from Tripadvisor
The only thing really worth seeing was the Emerald cave though there was quite insane traffic! Snorkelling was a weird experience: few small fishes, not the clearest water (as hundreds and hundreds of tourists visit it daily), no living corals (actually the first snorkeling was my own mistake as I didn’t ask the guide where exactly is the m2 with promoted corals - maybe they still are there somewhere…) and really strict time schedule, always hurry to somewhere else, it is important to jump into the water very quickly right after the boat has stopped and also to swim quickly. One thing that made me wonder: there is no toilet on longtail boats and trip lasts 5-6 hours - though organisers seem to believe that ocean handles everything, this insane amount of tourists may be too much… I can control myself but not sure in others, so just in case avoided swimming in the Emerald Cave laguna more than necessary. But the place itself and experience of going there are really unique and magical. Last stop was a paradise beach and they magically managed to offer us a very tasty warm Thai meal, suddenly there was also enough time for sunbathing and swimming. It is a beautiful place and heavily overcrowded just as all previous islands. Guides are really nice, helpful and friendly, be prepared that their English needs to be translated into English ;)

Riitta K,,Jan 8, 2025
- Review from Tripadvisor
The transportation was on time. The service was hight guality. The staff was energetic and helpful. Lunch was good and there was enought food and drings. We are very satisfied and happy!



174ferns,,Nov 24, 2024
- Review from Tripadvisor
Super cool! took us to some really unique places and told us some history of each. had a very yummy lunch and snacks along the way!
-10% off
From THB 1,038.50Was THB 1,153.89
Operated by Oh-Hoo