The Yser is a river located in northwestern Belgium, flowing through the region of Flanders. It originates from the Yser Canal near Diksmuide and travels approximately 78 kilometers before emptying into the North Sea at Nieuwpoort. The river is known for its historical significance, particularly during World War I. The Yser River is also notable for its role in the Battle of the Yser, where it served as a defensive line for the Allied Forces against the German Army. Today, the river is a popular destination for outdoor activities, including cycling and walking along its scenic banks.