Not far from Charlie's checkpoint is a place called Topographie des Terrors, which is located on the ruins of the Gestapo and SS headquarters during the Nazi German period. The original building was destroyed by Allied forces. Now it is an open-air museum, from which the Berlin Wall passed. It is a relatively well-preserved section of the Berlin Wall. I particularly liked their documentation center, but I saw it in a hurry, mainly because I had to go a little late and had to see people turn off the lights "rush visitors" before leaving. In so many pictures and materials, I pay more attention to the expression of ordinary people in that era, the excitement of the people, the indifference to death and the worship of totalitarianism, which are both remote and familiar to us. The trip to Berlin gave me a strong feeling that the Germans are indeed a reflective nation, daring to face up to the dark history of the country, which is reflected in many details. Berlin is not only a place with history, but also a place with stories. It is worth visiting again.