Mu Ko Similan National Park has been rated first by the U.S. publication Skin Diving of the top ten dive sites in the world. The Similan Island in the heart of the Andaman Sea are indeed unparelled in their exotic beauty. If planning a visit, keep in mind that anytime between December to April is recommended, with the best month being March, because the monsoons are over an the water is clear.

This park is situated at Mu 5, Tambon Ko Phra Thong, occupying an area of 84, 375 rai. It was announced as a national park area on July 9, 1981. To access Surin National Park, the shortest distance between the park and Phangnga is to use the fish marketing pier of Ban Hin Lat around the mounth of Nang Yong Canal area (the folks there call it Thun Nang Dam Canal).

This park is situated at Mu 5, Tambon Ko Phra Thong, occupying an area of 84, 375 rai. It was announced as a national park area on July 9, 1981. To access Surin National Park, the shortest distance between the park and Phangnga is to use the fish marketing pier of Ban Hin Lat around the mounth of Nang Yong Canal area (the folks there call it Thun Nang Dam Canal).

This bay is located between the North and South Surin Islands, and its narrowest point is about 200 m. It can be swam across during low tide. The water is shallow (1-3 m.), and it is a suitable place for playing, and learning to snorkel (snorkeling equipment rental fee is 100 baht/day/set).

Similan is really the Malaysian word for nine, as there are nine islands in the Similan group: Ko Bangu, Ko Similan, Hin Huwagralok, Ko Payu, Ko Ha, Ko Hok, Ko Miang, Ko Payan, Ko Payang, and Ko Huyong.

With sufficient supply of fresh water, Ko Miang is the second largest island where the office and guesthouses of the Similand Marine National Park is located. The island is famous for its beautiful beaches and colourful coral reefs.

Ko Hua Ka Lok or Skull Island is the seventh island in the Similan group. A rocky island of peculiar shape, it looks like a skull when viewed from one certain point. Ko Hua Ka Lok is renowned for its breathtaking underwater beauty on a many-tiered seabed.

This island is surrounded by coral reefs in several bays, some more than 300 m. wide. The reef edge contains numerous corals before sloping to a depth of 20-30 m.; for example, Ao Chong Khat, Ao Mai Ngam, Ao Sai En, and Ao Chak. The coral reefs here suffer little in the way of strong current or wave action and provide a suitable place to snorkel.

The coral reefs of the South Surin Island are only 100-200 m. wide, but they have more diversity than those of the North Surin Island. Some famous diving sites are Ao Phakkat, and Ko Torinla.