On the historic grounds of Germany’s first airfield at Johannisthal stands an aeronautical experimental park that traces key steps in aviation research. The site brings together several standalone technical monuments, each built for a specific purpose and time in the evolution of flight testing.
The Großer Windkanal, a high-speed wind tunnel constructed between 1932 and 1934, was built to be walked through, allowing close inspection of its interior. Nearby stands the Trudelturm, a vertical wind tunnel from 1934 to 1936 designed for spinning tests. Here, aerodynamic behavior in dangerous spin conditions could be studied and understood with greater precision.
The Schallgedämpfter Motorenprüfstand, created from 1933 to 1935, served as a sound-insulated test bed for aircraft engines. Its design helped reduce noise while allowing engineers to measure performance and stress under controlled conditions.
Set about 500 meters from the other structures are the Isothermische Kugellabore, also known as the Adlershofer Busen. Built between 1959 and 1961, these spherical laboratories were dedicated to experiments requiring stable temperatures, supporting research that demanded precise environmental control.
Source - https://en.wikipedia.org/wiki/Aerodynamic_Park
This castle is one of Berlin's oldest castles and where Prince Carl used to reside. Be sure to check out Glienicke Bridge, the bridge that became renowned for the exchange of Western and Eastern secret agents. You can also visit Glienicke Park.
The synagogue in the backyard of an apartment house is one of the biggest in Germany.
Designed by Daniel Libeskind with an excellent exposition on the Jewish life in Berlin and the impact of the Holocaust. You can easily spend a day here. There is a metal scanner and other security features you'd rather expect at an airport than a museum.
Want to feel like one of the angels in Wim Wenders' classic film Der Himmel über Berlin (a.k.a. Wings of Desire)? Climb to the top of Gold-Else, as the statue of Victory on the top of the Victory Column is known. Just don't jump off if you're not actually an angel. Unfortunately there is no elevator, so be prepared for 285 steps to the platform at 50.7 m.Else was built to commemorate Prussian military prowess in the wars against Denmark (1864), Austria (1866) and France (1870-71), and moved to her present location by the Nazis. Five roads run into a traffic circle called Grosser Stern, in the centre of which is the Siegessäule. Else is visible from much of the city district known as Tiergarten. At the base of the statue are reliefs of war scenes representing the conflicts which this monument memorializes. The Allies forced Germany to take those panels down in 1945, but they were remounted in 1984 and 1987. It also served as a backdrop for a speech by then senator Obama in 2008, after his request to speak in front of Brandenburger Tor caused a political debate in Germany.
Arguably the most beautiful bridge in Berlin and the only connection between Friedrichshain and Kreuzberg. As signage on the bridge indicates, it was built twice - once in the 1890s and once in the 1990s. Before reunification the border ran where the bridge now is.
An eerie memorial to victims of the Nazi regime built on the place of a former execution room, where nearly 2900 people where put to death between 1933 and 1945.
Erected in 1818 to a classically-inspired design by Karl Friedrich Schinkel as a guardhouse for the imperial palace, since 1993 this compact building has housed a small, but extremely powerful war cenotaph, the Central Memorial of the Federal Republic of Germany, continuing its use under East German rule as the primary "Memorial to the Victims of Fascism and Militarism". The interior of the Doric column-fronted building is intentionally empty, but for a small but moving sculpture by Käthe Kollwitz depicting a mother cradling a dead child. The statue is positioned beneath a round hole in the ceiling, exposing the figures to the rain and snow.
The largest aquarium in Germany with over 9000 animals that are presented on three storeys in a historic building. Aquarium Berlin is found on the premises of the Zoo, but can also be visited separately. One of the best places on a rainy day with children.
It was the only border crossing between East and West Berlin that permitted foreigners passage. Residents of East and West Berlin were not allowed to use it. This contributed to Checkpoint Charlie's mythological status as a meeting place for spies and other shady individuals. Checkpoint Charlie gained its name from the phonetic alphabet; checkpoints "Alpha" and "Bravo" were at the autobahn checkpoints Helmstedt and Dreilinden respectively. Checkpoint Charlie's atmosphere was not improved at all on 27 Oct 1961 when the two Cold War superpowers chose to face each other down for a day. Soviet and American tanks stood approximately 200 m apart, making an already tense situation worse. Now the remains of the Berlin Wall have been moved to permit building, including construction of the American Business Center and other institutions.At the intersection of Zimmerstraße and Friedrichstraße (U-Bahn Kochstraße U6) is the famous "You Are Leaving the American Sector" sign. The actual guardhouse from Checkpoint Charlie is now housed at the Allied Museum on Clayallee. For a more interesting exhibit go to the Haus am Checkpoint Charlie. This is a private museum with kitschy memorabilia from the Wall and the devices GDR residents used to escape the East (including a tiny submarine!). There are also people who set up booths here offering to stamp your passport with souvenir stamps in exchange for a small fee. You are highly advised not to put these stamps in your passport, as these are not official stamps and could invalidate it. Instead, bring along an expired passport or a small booklet to put the stamps in.
The building houses the personal offices of the Chancellor and the Chancellery staff. The Berlin Chancellery is one of the largest government headquarters buildings in the world. By comparison, the new Chancellery building is ten times the size of the White House. A semi official Chancellor's apartment is on the top floor of the building. The 200-m², two-room flat has thus far only been occupied by Gerhard Schröder chancellors since then have lived elsewhere. It is usually not possible to visit the building, but on occasion there are tours, usually around August. The building was deliberately designed in a way to symbolize the German constitutional system - it's in the line of sight of the Bundestag and lower in height, symbolizing the role of parliament in controlling government and "the people's house" being the higher power in the relationship between the two. Or at least that's the idea.
Again one of the world's most comprehensive ones. At the museum district of Dahlem.
It is the only hemp museum in Germany; you can see the history of hemp, the culture and use of it. You can see hemp grow. There is a cafe downstairs, with an open WiFi access. Everything going on here is legal - including the hemp growing under artificial light (a low THC strain grown with a special permit) - but they do not refrain from political commentary on the legal situation of cannabis in their exhibits.
A remarkable medium-sized classical castle by the famous K.F. Schinkel built 1820 to 1824, also called "Humboldtschlösschen", because Alexander and Wilhelm von Humboldt (and their family) lived here once. Still privately owned.