Manzanares (river) Manzanares (river) The Manzanares () is a river in central Spain, which flows from the Sierra de Guadarrama, passes through Madrid, and eventually empties into the Jarama river, which in turn is a tributary to the Tagus. In its urban section, the Manzanares River as it appears today, with a section of water several meters deep, in some parts navigable by canoes, is the result and the product of the work of dozens of years of channeling and damming. The river Manzanares has its source near the Navacerrada mountain pass in the Guadarrama mountain range. The upper river basin is
Grejs River Grejs River Grejs River () is an approximately river in Vejle Municipality in Denmark. Its source is Fårup Lake, south of the village of Jelling. It starts by heading east through a tunnel valley, then turns south to run through Grejs Valley (), the largest gorge in Denmark, until it reaches the city of Vejle. North of Vejle, it splits into two branches, Omløbsåen ("Bypass River") and Mølleåen ("Mill River"). Omløbsåen runs west around the city centre to meet Vejle River, while Mølleåen flows through the city and empties into Vejle River just south of the city centre. A section