A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. (From Wikipedia) Sometimes it might reach to the end and reach to lake and wait for evaporation. In most cases, river will flow to an ocean. Sometimes, people build canals for convenience to allow ships and docks of big ships to pass through. That will safe them a lot of time and prevent them getting into dangers and toils.
Charley River at Yukon
|With River||River Bed|
|Places which is named as river||Danube|