Four Islands by Longtail Boat

Not everyone wants the roar of a speedboat, and the longtail version of the four islands trip is the answer for travelers who would rather go slowly. A longtail is the long, narrow wooden boat of the Thai coast, driven by an engine on a swivelling pole, and on this route it carries a small group from the pier to the islands south of Ko Lanta at an easy pace. The itinerary follows the same pattern as the faster tours: a few snorkeling stops over shallow reef, a swim in the lagoon at Emerald Cave on Koh Mook, and a lunch break on a beach with a view of limestone towers. The difference is the feel of the day. You see the coast change as you go, you can hear the water, and the stops are less hurried. It is also one of the best-value ways to spend a day on Ko Lanta.

Because a longtail travels more slowly than a speedboat, the day is built a little differently. Departures tend to be earlier and the return later, since the crossing takes longer, and the crew often picks the order of stops to suit the tide at the cave. You spend more time on the boat itself, which is simple, shaded in places and open to the breeze, and that is a plus for people who like to watch the islands go by.

It is also easier on the stomach for many travelers, since the longtail rides lower and slower, though it can feel exposed if the sea is choppy. Seating is on benches or cushions, and there is not much storage, so pack light and keep valuables in a dry bag.

Snorkeling quality is similar to the speedboat tours because the stops are around the same islets. Expect shallow reef with a mix of hard coral, anemones, parrotfish and small schooling fish. The visibility is usually best in the dry season, from about December to March. Masks and snorkels are supplied and life jackets are required in the water. If you wear prescription glasses, consider bringing your own mask, because the supplied ones vary. Guides usually point out the best areas and watch the group closely, which is reassuring for beginners and families.

Emerald Cave is the shared highlight. You swim into a sea tunnel through Koh Mook in the dark, led by a guide with a torch, and emerge in a small lagoon beach enclosed by cliffs. It can be busy at midday, and the longtail boats often arrive earlier or later than the fastest speedboats, which sometimes means a calmer visit.

Be ready for a short wade over rocks and bring water shoes if you have them. Lunch is generally a simple Thai meal served on a beach or aboard, with fruit and water, but you should confirm what is included.

Who is it for? Budget-minded travelers, anyone who finds speedboats rough, and people who like the traditional feel of the Thai coast. It is also good for groups who are happy to trade speed for a gentler day. Families with children should check the minimum age and the life jacket sizes.

Come prepared for a long day in strong sun: a hat, a rash vest, plenty of sunscreen and a towel are essential. As with any boat day, weather decides, so keep your schedule flexible and have a plan B on land such as a cooking class.