Panel in Novoslobodskaya Station Photo © www.beeflowers.com
For my money, Moscow has to have the most beautiful subway stations in the world. The art & architecture are simply unrivalled (if you know of a rival, please send me a link to some examples!) and I've found a great photo gallery to prove it. Check out the Novoslobodskaya Station gallery in particular for some great stained glass photos, but don't forget to look around the entire site.