Similan is a Yawi or Malay word, which means nine or a group of nine islands. This is located in Tambon Ko Phra Thong, Amphoe Khura Buri, occupying an area of 32,000 acres. It was declared a national park on 1st September 1982.
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.
The National Parks office is located on Koh Miang. Similan is highly praised for its beautiful scenery, both onshore and underwater. It is situated 70 kilometres from Phang-nga town. Best time to visit is between November and April.