Keep a little mystery in your trip planning: Explorer Picture Mode shows a stylized version of every place instead of the real photo, so you can go by the description and reviews first and picture it your own way -- reveal the real photo any time by flipping the switch off, or just for one place at a time from its own page.
Create a free account to pick your own style (Vintage, Oil Painting, Black & White) and have it remembered next time you visit.
Of note is the Haus am Checkpoint Charlie, a museum dedicated to what was the best-known crossing point between East and West Berlin. Checkpoint Charlie was the name given by Western Allies to the crossing during the Cold War (1947-1991) and it was here that Soviet and American tanks came face-to-face during the Berlin Crisis of 1961. The museum contains artifacts and exhibits tracing the history of human rights in Berlin, as well as documentation of escape attempts, including cars, chair lifts and hot-air balloons. The guard house that once stood at Checkpoint Charlie is now on display in the open-air Allied Museum in Berlin-Zehlendorf.