During the approximately 2.5-hour walk from Karl-Marx-Allee to Boxhagener Kiez, you will be accompanied by the young Berliner Claudia, who is ready to compete with the mysterious device "Entdecktor" when it comes to city tours. Also featured in this audio walk are Rosi, a quintessential Berlin street mix, Georg, a newcomer, an original resident of the former Stalinallee, architecture critic Bruno Flierl, and last but not least, Otto Grotewohl himself, the first Prime Minister of the GDR.