Similan is one of the most famous diving sites in Thailand, and noted as one of the top ten dive destinations in the world according to the National Geographic Society.KohSimilan is the largest island. There are a total of 9 islands. The sea in the area has an average depth of 60 feet. Underwater it is full of rock formations and coral reefs in several shapes and forms, resembling such things as deer, leaves, brains, and mushrooms.Above the water are found many diverse species such as the Nicobar Pigeon, Mangrove Monitor Lizards and more.The Similan Islands are perfect for everybody whoenjoys the under-water world as they are filled with healthy coral reefs and rare marine species. Lucky you might come face to face with one of the turtles passing by as it is believed to bring a long live.