Victory Column
Google MapsThe Victory Column offers a superb view over the city. Among other things, it commemorates the Wars of German Unification.
Oberbaumbrücke
Google MapsA very beautiful bridge with an impressive arcade.
Gendarmenmarkt
Google MapsThe Gendarmenmarkt in Berlin-Mitte is considered one of the most beautiful squares in Europe and is famous for its classicist ensemble of the German Cathedral, the French Cathedral and the Konzerthaus.
Checkpoint Charlie
Google MapsCheckpoint Charlie was one of the Berlin border crossings through the Berlin Wall between 1961 and 1990. Although it is very popular with tourists, historically it is less significant than the Palace of Tears.
Palace of Tears
Google MapsTränenpalast (Palace of Tears) is the colloquial name for the former departure hall of the Friedrichstraße station border crossing in the Mitte district of Berlin. From here, S-Bahn and U-Bahn trains ran to West Berlin, and long-distance trains traveled via West Berlin into West Germany.
The name "Palace of Tears" originated because East German citizens and their Western visitors often said their goodbyes here in tears. The former generally did not have freedom of travel to the West.
Brandenburg Gate
Google MapsThe Brandenburg Gate in Berlin is an early Neoclassical triumphal arch located on the western side of the square Pariser Platz in the Mitte district of Berlin. It was built between 1789 and 1793 as the culmination of the central boulevard of the Dorotheenstadt district, the Unter den Linden, on the orders of the Prussian King Frederick William II, based on designs by Carl Gotthard Langhans.
Pergamon Museum. The Panorama
Google MapsThe main building of the Pergamon Museum is currently closed for renovations. However, a new building houses a panorama of a reconstruction of everyday life in an ancient city at different times of day.
Berlin TV Tower

The Berlin TV Tower, at 368 meters, is the tallest structure in Germany and the sixth tallest TV tower in Europe. From the sphere at the top of the tower, you have a unique view of the entire city. It also features a revolving restaurant.
It is very centrally located and easy to reach.
It is particularly recommended to buy tickets online for the restaurant. Online tickets are cheaper.
https://tv-turm.de/en/
High Swing Berlin
Google MapsSwing 120 meters above the rooftops of Berlin from the Park Inn Hotel and enjoy the breathtaking view of Alexanderplatz.
You should allow at least 30 minutes.
I think you have to book online. (There are time slots, after all.)
https://www.parkinn-berlin.de/en/high-swing-berlin/