Over the weekend I saw a TV documentary on "Stalin's Underground Moscow". This included a few sections on the Moscow Metro (including the rumoured Metro 2 which allegedly shadows some of the regular Metro lines). Given the Moscow Metro is one of the largest, busiest systems in the world & has a reasonably long history covering several different eras, does anyone know how it stacks up against others like New York, London & Paris? What I mean is, are there any particular quirky, varied, unique or interesting features of its operations which would appeal to an enthusiast? A quick trawl of articles by on Tripadvisor seems to say the stations are impressive and it's cheap and extensive, but the trains can be heavily overcrowded, old, dirty, Soviet-era construction and the system is hard to navigate without knowing the Russian alphabet. But these may be the views of western (= American) tourists who aren't used to big city subways in any country. Does anyone have experience the nitty-gritty of the Moscow Metro (apart from the famous marble-lined stations, chandeliers & statues) and how it compares to other large-scale city subways?