Discover the four Islands of Koh Lanta on board of the big tour boat 'Hello Andaman' with two convenient decks and plenty of space. Stop at Koh Kradan, Koh Chuak and Koh Ngai for snorkeling, and take a swim into the Emerald Cave or 'Tham Morakot' on Koh Mook which is the highlight of this one-day tour. Choose the kayak option and marvel at the wonders along the coastline of the islands.