Few rafting rivers in the world can match the thundering courses of the rivers of Nepal, which originate from the snow meltdown and the rains in the Himalayan terrains and contours. The rivers gush through twisted canyons, and wind through valleys and tame out only as they spill out into the Gangetic plains of India to merge with other river systems. A river trip is one of the best ways to explore the typical cross-sections of the country's natural and ethno-cultural heritage. White-water thrills provide massive doses of adrenaline.