Kreuzberg is a district of Berlin, Germany. It is part of the Friedrichshain-Kreuzberg borough located south of Mitte. During the Cold War era, it was one of the poorest areas of West Berlin, but since German reunification in 1990, it has become more gentrified and is known for its arts scene.
The Berlin U-Bahn is a rapid transit system in Berlin, the capital and largest city of Germany, and a major part of the city's public transport system. Together with the S-Bahn, a network of suburban train lines, and a tram network that operates mostly in the eastern parts of the city, it serves as the main means of transport in the capital.
U1 is a line on the Berlin U-Bahn, which is 8.8 kilometres (5.5 mi) long and has 13 stations. Its traditional line designation was BII. It runs east–west and its eastern terminus is Warschauer Straße S-Bahn station where it connects to the Schlesische Bahn. From there it runs through Kreuzberg via Gleisdreieck and Wittenbergplatz on to the Kurfürstendamm.
U2 is a line of the Berlin U-Bahn. The U2 line starts at Pankow S-Bahn station, runs through the eastern city centre (Alexanderplatz) to Potsdamer Platz, the western city centre and finally to the Ruhleben terminal station.
Görlitzer Bahnhof is a Berlin U-Bahn station on the viaduct of lines U1 and U3.
Kottbusser Tor is a Berlin U-Bahn station located on lines U1, U3, and U8. Many Berliners use the affectionate term Kotti.
Prinzenstraße is a Berlin U-Bahn station on lines U1 and U3.
Hallesches Tor is a Berlin U-Bahn station in the central Kreuzberg quarter, served by lines U1, U3, and U6. It is named after the historic Hallsches Tor of the Berlin Customs Wall, erected in the 18th century.
Möckernbrücke is a station of the Berlin U-Bahn network in the western Kreuzberg district, in the vicinity of Potsdamer Platz, named after a nearby bridge crossing the Landwehrkanal. It is served by lines U1, U3, and U7.
Gleisdreieck is an elevated Berlin U-Bahn station located on a viaduct in the Kreuzberg district, and served by lines U1, U2, and U3. The U1/U3 platform is at a higher level than, and perpendicular to, that of the U2.
The Oberbaum Bridge is a double-deck bridge crossing Berlin, Germany's River Spree, considered one of the city's landmarks. It links Friedrichshain and Kreuzberg, former boroughs that were divided by the Berlin Wall, and has become an important symbol of Berlin's unity.
Warschauer Straße is the eastern terminus station of lines U1 and U3 of the Berlin U-Bahn.
Stralauer Tor was a Berlin U-Bahn station in Berlin-Friedrichshain. It operated between Warschauer Straße and Schlesisches Tor stations on today's U1. Following its destruction in World War II it was never rebuilt and is one of three Berlin U-Bahn stations to have been abandoned after having previously been in service.
Berlin Brandenburger Tor station is an underground railway station in the central Mitte district of Berlin, Germany, located on the Unter den Linden boulevard near Hotel Adlon, Pariser Platz and Brandenburg Gate. It is served by the Berlin S-Bahn and U-Bahn, as well as local bus lines. The station was known as Berlin Unter den Linden from 1936–2009.
Warschauer Straße is a major thoroughfare in the Friedrichshain-Kreuzberg district of central Berlin, the capital of Germany. The street begins at Frankfurter Tor to the north and spans 1.6km south to the intersection of the Oberbaumbrücke, Mühlenstraße and Stralauer Allee. The street acts as a section of Bundesstraße 96a and the Berlin Inner Ring Road. The street is named after Warsaw, the capital of Poland.
Frankfurter Tor is a station on U-Bahn line U5 in Berlin, Germany. It is situated under Frankfurter Tor, a large square.
The U12 is an inactive Berlin U-Bahn line. It existed between 1993 and June 2003, as a peak-time and night line between Ruhleben and Warschauer Straße stations. The route remains available for temporary use when it is not possible to run a full U1 or U2 service for reasons such as maintenance.
The Berlin Customs Wall was a ring wall around the historic city of Berlin, between 1737 and 1860; the wall itself had no defence function but was used to facilitate the levying of taxes on the import and export of goods (tariffs) which was the primary income of many cities at the time.
The Berlin U-Bahn originated in 1880 with Werner Siemens' idea to build an urban railway in Berlin. During the nine years after the German Empire was founded, the city's population grew by over one-third and traffic problems increased. In 1896, Siemens & Halske began to construct the first stretch of overhead railway. On 1 April 1897, the company began construction of an electric underground railway. The Berliner Verkehrs Aktiengesellschaft (BVG) was formed in 1928, and took over further construction and operation of the network. In 1938, the company was renamed Berlin Transport Company; the original acronym, however, remained. Since 1994, the BVG has been a public company.
The tracks of the Berlin subway are lines operated in the line traffic, operating distances, which serve only internal purposes, turn-off and turning plants and plants in the operating farms.
: 165, 265, N1, N60, N65
: Berlin A/5555 [1] 
