The first picture is the famous Checkpoint Charlie where East met West in Berlin. The 2nd one is, of course, the controversial Holocaust Memorial in center of Berlin. The 3rd one is the famous Brandenburg gate. Fourth image shows the actual remains of the Berlin Wall that shut the east Berlin off the world. And the last one is the beautiful Protestant church of Berlin that had been badly damaged during the WW II but some restorations works done in 1980s returned this pretty piece of architecture to life and it is now being used as a church and also a museum.
You can click on any picture to enlarge.