The Angthong Marine National Park or Mu Ko Ang Thong National Park is an archipelago in the Gulf of Thailand consisting of 42 small islands. The main islands are Phaluai, Wua Talap, Mae Ko, Sam Sao, Hin Dap, Nai Phut and Phai Luak. The island group is just a few kilometers west of Koh Samui and Koh Phangan. The entire park covers an area of 102 km², of which only 18 km² are occupied by the islands.
For a long time, the island group, which forms the present Marine National Park, was a forbidden area: the Navy wanted to build a base here to keep the Gulf of Thailand “in view”. Of course, neither the fishermen from the area nor the daring tourists stopped to explore the secluded beaches. In 1972 the first efforts began to turn the area into a national park. On November 12, 1980, it was time.
The Ang Thong Marine National Park has one of the most famous vantage points in Thailand. On the island of Koh Wuatalab, at an altitude of about 500 meters, you can see the entire island group. The Green Lagoon is located on the isle of Koh Mae Ko. A salt water lake connected to the sea by underground canals. From Ko Mae Ko you have a fantastic view over the western part of Angthong Marine Park, which in good weather reaches Koh Samui or Koh Phangan.