The Great Isar is the heavily canalized arm of the Isar in the city center. The section between Ludwigsbrücke, Wehrsteg and Mariannenbrücke could become a river bath. First pre-plans are currently running.
At night the weir is illuminated. The fields of the weir are each illuminated individually. The corresponding lamps go on and off. The result is an entertaining play of lights in front of the church of St. Luke.