This cycle path is part of the Berlin-Copenhagen European long-distance cycle path and connects the Berlin-Hakenfelde district with the Niederneuendorf district (according to the wiki) of Hennigsdorf in the Oberhavel …
Many paths lead to the Drachenberg: moderate asphalt paths from the Teufelsseechaussee or steep sand paths from the direction of the Teufelsberg. From Drachenberg you can enjoy a wonderful view of West Berlin and the ruins on the Teufelsberg.
Great driving experience. The cars are (mostly) very considerate and there are many, many, many other racing cyclists on the road. The Mecca of Berlin.