Koh Yao is the only island in the lower Songkhla Lake. Located in the southwest of Songkhla. Most of the islands are not high mountains. There is a plateau near the sea. There is a plain plateau in the south of Koh Yao. The fabric of Koh Yao is a famous local fabric and popular among Thai wearers. There are unique designs such as royal flower, Pikul flower, Phayom fabric care. Koh Yor is also a source of white sea bass in cages in Songkhla Lake.