In the heart of Cambodia, in the Southern area of Siem Reap is the Tonle Sap Lake, named after the Khmer បឹងទន្លេសាប, (Boeung Tonle Sap) meaning “great river of fresh water”, more frequently translated as “great lake”. For Cambodians, it is a site of vital importance from an ecological, economic, social and cultural point of view.