Scuba diving is Thailand's most popular water sport, and it's an experience you cannot forget. Koh Samui is a good starting point to discover scuba diving. There are many dive schools scattered over the island offering all PADI courses from Bubblemaker to dive master. On Samui you will mostly learn the basics and first steps of scuba diving while the actual dives will take place near the surrounding islands like Koh Tao or the Angthong National Marine Park.