
Without doubt, a boat-trip to Ang Thong National Marine Park will be a highlight of your stay here, indeed in Thailand. There are 41 islets scattered like green teeth among the turquoise waters north of Samui, and most day-trips allow you to climb to the top of the largest one for breathtaking views over the whole archipelago. If you’re lucky, you may spot dolphin (Feb-April), macaques, sea otters, monitor lizards, mynah birds, swifts (whose nests are stolen to make birds nest soup) and other exotic birds like the white-rumped shama. A respectable second-best to Ang Thong is a day's snorkelling in the corals off Koh Mad Sum island, 4km southwest of Samui. You can usually find a (shared) taxi-boat from Baan Bangkao or Baan Thongkrut piers.