The jewel of Champassak province, Phon Phadeng Waterfall is located in east of Don Khong on the Mekong River. Further downstream, the Mekong cascades across a wide mound of rocks which slopes in curvilinear pattern and coloured rainbows as the sunlight hits the sprays. It's the Niagara of Asia, the widest waterfall, more than 20 kilometers in width. A place where the Mekong River takes a turn before continuing its course into the South China Sea after passing through Cambodia and Vietnam. It's also renowned as a fish basin. These spectacular waterfalls render this section of the Mekong River enviable.