Soviet Subway Series
The metro stations and platforms in St. Petersburg and Moscow are amazing.  More often than not, you descend underground and find yourself in what seems to be a 19th century ballroom.  Coated in marble and full of chandeliers, you expect everyone to start waltzing.  Combine that scene with heavy-handed Soviet propaganda and you’ve got the wonderfully weird mix that is Russia’s subway system.
Some considerably quieter moments: