Established in 1980, Mu Ko Ang Thong National Marine Park is an archipelago of 42 islands covering an area of 102 square km, belonging to Kusamui Island in the Gulf of Thailand. This park consists mainly of rugged and sloping limestone hills, ponds, caves, and inland lakes, along with a number of diving sites, where the average sea depth is about 10 meters, and gives an opportunity to see many different marine species, such as green sea turtles and spotted fish Yellow, etc. The best time to dive is from February to October.