You can’t say you’ve been to Berlin if you haven’t been to its most famous street: Unter den Linden.
Here are some of the attractions you’ll see along the street and its immediate vicinity:
Berliner Dom or Berlin Cathedral. The picture on the left also shows the Fernsehturm or TV Tower
At the western end of Unter den Linden: the Brandenburg Gate (Brandenburger Tor in German. See map)