Introduction to Tonle Sap: Tonle Sap, also known as Phnom Penh Lake, is located in the heart of Cambodia. It is the largest freshwater lake in Southeast Asia. It runs from northwest to southeast, across Cambodia, and intersects with the Mekong River that runs through Cambodia in Phnom Penh. It is like a huge green emerald inlaid on the land of Cambodia. It provides a solid resource guarantee for the development and prosperity of the Khmer nation. It is the heart of the Cambodian people. The "Lake of Life".