If you want to understand Cambodian, you should go to the water. Lake Tonlé Sap supplies half of Cambodians with fish and water for agriculture, and its ecological significance extends far beyond. The Tonlé Sap River performs a natural wonder every year: from October to June it directs the lake water northeast into the Mekong until the latter, strengthened by meltwater from Tibet, pushes it back and changes its direction of flow. So the Tonlé Sap lake increases four to five times!