Koh Surin, Koh Surin Tai are two attached islands separated by a water channel. There are both large and small bays scattered around the islands, all with distinctively beautiful beaches. Koh Surin Nuea is where the Park' s Ranger Station is located with a Tourist Service Centre, bungalows, camping site, and long-tailed boats for rent to visit various islands are all here.Similan is a Yawi or Malay word, which means nine or a group of nine islands. Similan is a small group of islands comprising nine islands stretching from north to south, respectively, namely: Koh Bon, Koh Bayu, Koh Similan, Koh Payu, Koh Miang (two adjoining islands), Koh Payan, Koh Payang, and Koh Huyong. Best time to visit is between November and April.Koh Tachai, Island is located at the northern most tip of the Similan National Park. On Koh Tachai you will find beautiful white beaches and azure crystal clear waters all around it.