Since the construction of the first lines in London and Budapest over 150 years ago, underground stations have become the most frequented places on earth. Without highly efficient underground and suburban rail networks, mega-cities in particular would not be able to survive.
The design of most stations was initially purely functional – often dull caves for mass transport. Moscow was an exception from the very beginning. Later, Stockholm, Lisbon and Brussels also had their stations not only built by well-known architects but also adorned with works by renowned contemporary artists.