TUNEL
Tunel is on of the oldest and most probably the shortest underground railway in the world. It was built in 1873 by French engineers and has a length of about 500 meters. Most foreign businessmen and all the foreign embassies moved to Beyoglu Istanbul. However, business, offices and companies stayed in Karakoy (Galata). The primarily purpose of the construction of this small subway was to avoid climbing up and down. There is no chance to get out at the wrong station, for there're only two, one in Karakoy (Galata) and one in Beyoglu at Tunel Square end of Istiklal Street.
