TRAVELThailand Has Islands Most Tourists Never Find8 min read

The Similan Islands Built Their Reputation on Underwater Boulders

The Similan Islands — nine in total — are a group of forested islands in the Andaman Sea forming part of Mu Koh Similan National Park. The same rounded granite boulders that scatter the land surfaces also sit offshore underwater, where they have created natural reef structures. Combined with exceptional water clarity, these formations have positioned the Similans among the top scuba diving destinations globally. Ko Similan, the largest island, serves as the main base for exploring highlights like Sail Rock, Sunset Point, and Similan Viewpoint. There are no hotels on the islands — accommodation is limited to wooden bungalows and campsites, which keeps visitor numbers controlled. Hiking and bird watching round out the options for non-divers, though most people who make the trip prioritize the water.

Ko Mak Made the Sunday Times’ Hidden Islands List

Ko Mak earned a spot on the Sunday Times’ list of the ten most beautiful undiscovered islands, and it has largely held onto that status. Small and undeveloped, it lacks the convenience stores and resort strips that define more commercial Thai islands. But quiet does not mean short on things to do. Ko Mak supports yoga sessions, Muay Thai training, diving, snorkeling, Thai cooking classes, and tours of its rubber tree plantations. The Ko Mak Museum offers local history context, and Ko Mak’s Erotic Art House provides an unexpected cultural detour. Tennis courts, mountain biking, sea kayaking, and beach volleyball fill out the activity list. The balance between genuine activity options and real seclusion is what keeps this island appearing on curated travel lists.