Michael noticed that one of our regular stations, Platz der Luftbrücke, has a plaque that the station used to be called "Kreuzberg" (see picture above). Well, it's obvious that the name "Platz der Luftbrücke" [the Berlin Air Lift] is a relatively recent name. So I looked into it...and found this amazing website, http://www.alt-berlin.info with great old maps of the city. The history of the U-Bahn is relatively recent but they have maps of the city going back to 1738. Here is another super amazing (I know, so nerdy...) site with info about all the stations: http://www.untergrundbahn.de/, and even some historic pictures.
So you can see above the station is called "Kreuzberg", you can also see the Viktoria Park. And in the map below from 1926, the stop is marked with an open circle (incomplete?). In the last one below, it's already renamed "Flughafen" (Airport).
|Hallesches Tor - today and before the war|