Mass Transit

http://commons.wikimedia.org/wiki/Image:Moscow_Metro,_Kievskaya_station.jpg
Image: Wikimedia Commons

Moscow has the most heavily used metro system in the world, carrying 8-9 million passengers on a normal weekday. It has 170 stations and 12 lines, including an unusual “ring line” that circles the city.

According to legend, this came about when Stalin’s coffee cup left a ring on one of the blueprints. Historians dispute this account — but on maps, the ring line is always printed in brown.