Sound: http://audiojungle.net/item/in-the-city/65517?s_phrase=in%20the%20city&s_rank=3&_ga=1.60783594.633226203.1417113120 A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases a river flows into the ground and becomes dry at the end of its course without reaching another body of water.