East Berlin relied additional on trams and S-Bahn as well as U5 which was typically designed previously mentioned ground is the one line extended by east Berlin. The one underground U-Bahn station developed by east Germany is "Tierpark" along U5. You will discover naturally other stations, intended by other architects; https://mobile-cocktailbar19753.wikiconversation.com/6738951/indicators_on_berlin_you_should_know