We just discovered this Moscow Metro Map (larger version) on the Coudal Partners website. What is truly striking is the extent of this system . A fantastic web of public transportation with a loop ring and fingers into the surrounding city. Communists can sure do some things right...SEPTA I'm talking to you! Below is Philly's rail system map. You will notice how large swaths of the city are completely unserved by a rail system that consists of mainly feeders to and from the suburbs.
The simplicity of the Philadelphia SEPTA system is dwarfed by the system shown below. The Moscow Metro Map gets more complex when they add all the layers, although confusing, just look at how connected this place is...amazing.