The "Wuppertaler Schwebebahn" is a single rail suspension railway with double flange wheels, which is running on a 13,3 kilometer long double track line between Wuppertal Oberbarmen and Wuppertal Vohwinkel, on about 10 kilometers length high above the Wupper river. In the Vohwinkel work and stable hall, three generation of vehicles can be seen side by side, from left GTW 72 # 16, "Kaiserwagen" (car of the emperor) generation 1900 # 5 and GTW 15 # 13 fresh from the factory in Valencia/Spain.