This idyllic marine park occupies an area of 130 square kilometers in the Andaman Sea.

The Similan Archipelago consists of nine islands. It is highly blessed with both surface and underwater beautiful scenery. The high season begins towards the end of December, after the monsoon season, when weather conditions are excellent and the water is clean and clear. The underwater world around Mu Ko Similan is rich with stone piles, coral reefs, cliffs, and an abundance of marine life. Diving and fishing are both extremely popular and can be easily arranged. Soft, sandy beaches line each island, with scenic lush flora further inland .