The Noah's is located directly in front of Wittenbergplatz - vis-à-vis KaDeWe.

The square forms the terminus of the Tauentzienstraße, a major shopping street. KaDeWe, the largest department store in Continental Europe, lies on one corner of the square, where it opens onto the street. The northern side of the square is home to street markets four times a week. The center of the square is occupied by the impressive Wittenbergplatz U-Bahn station. 

(Source: wikipedia)