Tha Le Waek or in other words the sand dune that emerged from the reduce in sea level. Tha Le Waek consisted of sand dunes from 3 islands: Koh Kai, Koh Mor and Koh Thap, which all these 3 islands are located near each others. When there was a long wave of the sand blowing into this point, it will make up the sand dunes that link these 3 islands. This sand dune will disappear when the sea level is increase and will emerge when the sea level is gradually decrease and seem like the sea was divided into three parts.