In the Spreewald the river passes through the towns of Lübbenau, Lübben and Leibsch. Just below Leibsch, the Dahme Flood Relief Canal diverts water from the Spree to run into the River Dahme at Märkisch Buchholz. The Spree continues north from Leibsch before flowing into the Neuendorfer See at the northern edge of the Spreewald. From the Neundorfer See it then flows in an easterly direction to the Schwielochsee, and then in a northerly and westerly direction to the town of Fürstenwalde. From Fürstenwalde the river continues to flow westwards, through the Dämeritzsee and Müggelsee, to Köpenick in the southeastern part of Berlin, where it is joined by its tributary, the River Dahme.