Berlin is such a historically profound city that it both awes and terrifies me. Cheryl and I went on a free walking tour and it was mindblowing to see the juxtaposition of Berlin's most known landmarks — the SS Headquarters (Topography of Terror) and Berlin Cathedral were in such close proximity that you could be discussing war horrors or torturing a prisoner before sauntering over to pray to be a better person.
Adjacent to Berlin Cathedral is Lustgarten (literally, Pleasure Garden — see how close German is to English?). The unassuming park saw numerous rallies and protests during the years of Weimar Republic. Later, under Nazi Germany, Hitler held rallies attended by up to a million people in Lustgarten.