When you arrive in Ton Sai, the village on the island of Phi Phi Don, your first instinct might be to head in the opposite direction, such is the impact of tourism here. Don’t lose heart, however; instead, climb up to the viewpoint for a sublime view of the island, then dive into its crystal-clear sea to explore its incredible underwater world. Don’t miss the two small islands to the north, namely Ko Mai Phai and Ko Yung.