River Great Ouse

The River Great Ouse () is a river in the England. It is the longest of several British rivers called "Ouse". 
From Syresham in central England, the Great Ouse flows into East Anglia. It goes into the Wash, a bay of the North Sea. 
Its course is , mostly flowing north and east. It is the fifth longest river in the United Kingdom. The Great Ouse was important for commercial navigation, and for draining the low-lying region through which it flows. 
Its best-known tributary is the Cam, which runs through Cambridge. Its lower course passes through drained wetlands and fens. It has been extensively modified to relieve flooding and provide a better route for barge traffic. It now enters the Wash after passing through the port of King's Lynn.