Berlin: Top 10 Attractions

10. Kaiser Wilhehm Memorial Church

 9. The Holocaust Memorial



8. Brandenburg Gate



7. Pergamon Museum

6. Memorial of the Berlin Wall

 5. DDR Museum

 4. German Historical Museum
The German Historical Museum (Deutsches Historisches Museum), DHM for short, is a museum in Berlin devoted to German history and defines itself as a place of enlightenment and understanding of the shared history of Germans and Europeans.

3. Topography of Terror

2. Berlin Zoo
The Berlin Zoological Garden (German: Zoologischer Garten Berlin) is the oldest and best known zoo in Germany. Opened in 1844 it covers 34 hectares (84 acres) and is located in Berlin's Tiergarten. With almost 1,500 different species and around 19,500 animals the zoo presents the most comprehensive collection of species in the world

1. Checkpoint Charlie

The list is a summary from a youtube video on the same subject
Other source; Wikipedia