Moscow Metro, Above and Below Ground.
Bee Flowers took some amazing photo of the Moscow Metro stations. This one is Electrozavodskaya, the larger pic at Bee's website is much, much cooler: http://www.beeflowers.com/Metro/-Startfiles-/index.htm
If you prefer the gritty look of the Moscow metro, why not take a look at the underground railways themselves? (for more, see: Link. Original photographer's website: Link - Thanks Alex A. Naanou!)
See also: Moscow Subway Car "Nailed to the Ground", People You Meet in the Moscow Subway, and Subway Stations from Around the World.
I think the links in this item should reflect the original author of the images and not a travel agency that uses the images and the generated traffic to spin banners...
the original photographer is: http://russos.livejournal.com/
Thanks!