U7 (Berlin U-Bahn)

The U7 is a rail line on the Berlin U-Bahn. It runs completely underground for a length of 31.8 kilometres (19.8 mi), through 40 stations; and connects Spandau, via Neukölln, to Gropiusstadt and Rudow. The line was originally the south-eastern branch of the Nord-Süd-Bahn (U6) that ran between the branching point at Belle-Alliance-Straße (Mehringdamm) and Grenzallee; however, in the 1960s, this stretch was separated from the rest of the line and extended at each end to form a new line. As of 2007, the U7 is Berlin's longest underground line, both in terms of absolute length and total travel time and one of the longest subterranean lines in Europe.

Starting in Rudow, at the junction of Gross-Ziethener Chaussee and Neuköllner Straße, the U7 runs northwest below the road Alt-Rudow, before bearing west under Gropiusstadt. Because the settlement and underground construction there were planned simultaneously, the U7 follows no roads until it reaches Britz-Süd station, where it runs under Fritz-Reuter-Allee as far as Blaschkoallee before joining the route of Buschkrugallee. It continues north, crossing the urban motorway and the Ringbahn while under Karl-Marx-Straße, then heads north-west under Hasenheide, Südstern and Gneisenaustraße until it reaches Mehringdamm after a very sharp right curve. A tight left curve brings the U7 under the Tempelhofer Ufer (English: Tempelhof waterside) to Möckernbrücke station, with another taking it back and below the area of the former Anhalter Güterbahnhof (English: Anhalter goods station). The route continues west under Yorckstraße, Willmanndamm, Grunewaldstraße, Bayerischer Platz and Berliner Straße, then heads north under Brandenburgische Straße to Adenauerplatz.

A curve into Wilmersdorfer Straße takes the U7 north to Bismarckstraße, where it makes a further turn into Richard-Wagner-Straße, travelling under this road and its northern continuations Wintersteinstraße and Sömmeringstraße. At Jungfernheide station, the U7 crosses the Ringbahn for the second time before passing under the Westhafenkanal. The track then turns west through a wide arc and follows Siemensdamm and Nonnendammallee. It passes to the south of the Spandau Citadel below the road Am Juliusturm, runs under the Old Town of Spandau, and ends at the Spandau city hall.

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