The Berliner Unterwelten e.V. has been researching and documenting the historical connections of Berlin's underground since 1997. The hidden historical sites bear witness to Berlin's eventful and often dark history and are accessible to the public through tours. The thematic focus here is on the time of the Nazi regime and the German division. The tours accompany visitors to the underground sites and provide an impressive and exciting discovery tour that brings Berlin's history to life. In Berlin's bunker sites, for example, you can learn how people tried to escape through tunnels or through the sewers at the time of division, or what the "ghost stations" were all about. In addition to the tours, the museum offers history education through exhibitions, educational seminars, specialist lectures, commemorative and information panels, performances and events.

The history exhibition of the Berliner Unterwelten e.V., a separate section of the Berlin Underworlds Museum at the Gesundbrunnen, takes a look at architecture and urban planning in Nazi-era Berlin under the title "Mythos Germania - Vision und Verbrechen" (Myth of Germania - Vision and Crime) and analyses the ideological objectives and criminal consequences. Albert Speer's plans for Berlin were not a utopia, but a concrete building project. As Hitler's chief architect and "General Building Inspector for the Reich Capital" (GBI), he designed broad axes and monumental buildings of enormous dimensions to demonstrate the Nazi system's claim to power. Berlin would no longer have served as a living space, but as a representation space for the regime. The multimedia exhibition invites visitors to independently explore the multi-layered topic.