A group of 9 small islands 50 kms. The National Park covers an area of 80,000 rai. Skin Diving Magazine rated them among the ten loveliest places on Earth, because of the great natural beauty found on the islands themselves and also because of the extensive surrounding coral gardens beneath the waves. Similan is corrupted from the Malay Sembilan and means nine. Beneath the waters, a field of grass and coral appear to be growing in a deep valley.
Schools of fish are everywhere.
It has a long curving bay, and beneath the waters coral reefs remain pristine. The beach is composed of fine grain sand. Diving to look at the fishes and corals is strongly recommended. Here also is an excellent view. From November till February sea turtles come up to lay eggs and their tracks may be seen in the sand.