Berlin U-Bahn

2 photos taken on September 22, 2016.

The Berlin U-Bahn, short for Untergrundbahn (meaning underground railway) is a rapid transit railway in Berlin, the capital city of Germany, and a major part of the city's public transport system. Opened in 1902, the U-Bahn serves 173 stations spread across ten lines, with a total track length of 151 km, about 80% of which is underground. The entire system is maintained and operated by the Berliner Verkehrsbetriebe, commonly known as the BVG.