The Allied Museum is situated in the heart of the former American sector, on Clayallee in Berlin’s Zehlendorf district, the vibrant focal point of life in the American garrison. General Lucius D. Clay Headquarters, Truman Plaza shopping center, and the American Forces Network (AFN) radio station were all located in the immediate vicinity. The Cole Sports Center and United States Army Chapel on Hüttenweg were also nearby. The largest American housing area, now the Parkviertel Dahlem, is also adjacent to the Museum grounds.
Some info on the allied museum. Also visited the soviet war memorial which was very interesting. Another interesting place to visit is Track 17 in Grunewald. It is a memorial to the trains that left from there to the the camps. Its right at the train station, in a very nice suburban part of town so you get a feel for what the average towns person might have seen of their neighbors during the war. There is also Wannesee (I actually think the exhibit is not very good) but the house and surrondings are beautiful. Max Lieberman also has a villa/musuem about a 5 minute walk from the Wanasee house and the area is very upscale and nice to walk around in. There is a circular bus route from the train station that will take you to both easily.
and one more .. The German Resistance Memorial Center The courtyard has a memorial to the Stauffenberg and the Valkyrie members. Pretty much every step you take in Berlin has some interesting history. There are wonderful plaques on the streets to give you an idea of the history of a particular building.