Rivers are natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases a river flows into the ground. river island, river safari, river safari, kayak and rafting is making. a natural river of turkey, name is munzur river. the rivers watwer ca drink. The Munzur Valley National Park is the largest and the most biodiverse national park in Turkey. River flowing rapidly down a deep valley right.