Heinrich Zille’s photo of Berlin’s working-class children playing in the streets, taken between 1900 and 1910.

It is only one of many wonderful Zille images decorating the walls of the U-Bahnhof “Fehrbelliner Platz” on U3 Line, opened in 1913.

The other part of that station, for the extended U7 Line, was not built until the 1960s. Hence its futuristic aesthetics, especially of the overground section with its red hue and organic, rounded edges. The building is sometimes referred to in Berlin as “Bohrinsel”, ” Drilling Rig”.