Tonle Sap Lake

Tonle Sap Lake, in Cambodia, is the largest freshwater lake in Southeast Asia. It plays a vital role in local ecology and economy, fluctuating dramatically in size between the wet and dry seasons—expanding up to five times its dry-season size during the flood period. The lake supports diverse fish populations, providing food and livelihoods for millions of people. Its unique hydrological cycle, driven by the Mekong River’s seasonal flow, creates rich wetlands that sustain wildlife and local communities. Tonle Sap is both a critical natural resource and a cultural center for the region.