My Underground station and giant transportation hub is Alexanderplatz. You probably can’t read it on the blue sign on the right.
There was a festival going on in the plaza part of Alexanderplatz – these festivals are starting to feel permanent – and the fountain was fenced off. I had read that this fountain, the GDR Fountain of the Friendship of Peoples, was an important gathering point and site of active graffiti ‘work’, but not now.