Bonn Om Touk - Water Festival by Mekong Delta Travel

Mid November, three days. The Tonle Sap River is the only waterway in the world which flows in opposite directions at different times of the year. For most of the year the river flows out from the lake into the Mekong. However, during the rainy season from about June to October the Mekong rises, causing the Tonle Sap River to reverse its direction and the lake to swell to more than twice its regular size. At the end of the rainy season, when the water level of the Mekong drops again, the current reverts and flows back into the Mekong. This unique natural phenomenon is celebrated with three days of boat races, fairs, festivals, shows, parades, fireworks, music and dancing.