Kaiser-Wilhelm Gedächtniskirche
More than a mouthful to say, there really isn't too much of this church left.  Bombed out during WWII, the remainder was shored up and it was made a memorial.  Standing back a city block, you can view it from Europaplatz through this wonderful sculpture.  I have no idea what it is, but my interpretation is "Two Berlins, much in common, yet unable to touch."  Of course, even by the time I took this photo, Berlin was reunited.