According to legend, there once was a king who commanded an army on the island. Because there was no fresh water using, the king searched everywhere to find some. At last he found a rock near the sea. He think that the rock might contain water so the king drew his sword and split open the rock, releasing an endless flow of water that local people still use today.
Koh Sdech is located about 81 kilometers south of Koh Kong in Kirisakor district. Nowadays Koh Sdech was attracts many visitors from Sihanoukville and Sre Ambil district because of a long beach, and the sea is filled with a variety of fish. The site is excellent for snorkeling or scuba diving, as the water is clear, and an array of coral can be seen growing at the bottom of the sea.