 Similar to an exclave it is linked to Berliner mainland with a road ("Woltersdorfer Landstraße") forming a strip, as in Steinstücken.The other municipality bordering with Rahnsdorf is Schöneiche, also part of Oder-Spree.Another peculiarity of Rahnsdorfer borders with Brandenburg is represented by "Landjägerallee", a road parallel to the railway that forms a thin and long strip belonging to Erkner surrounded by Berliner territory.