Koh Lanta
Just off Thailand’s south-western town of Krabi lies the spacious island of Koh Lanta with its verdant undergrowth and 27-kilometre coastline. To really explore, hire a moped and head southwest to the Mu Ko Lanta National Park with its great snorkelling and abundance of wildlife. Or take a boat 30 kilometres to the tiny uninhabited islands of Koh Rok Nok and Rok Nai. The snorkelling here is sublime, with regular sightings of blacktip reef sharks and hawksbill turtles.