Genuinely, I wonder if there is a subway system in the world more filthy. In NYC I've seen the back of cars and elevators that were treated as literal toilets..

Genuinely, I wonder if there is a subway system in the world more filthy. In NYC I've seen the back of cars and elevators that were treated as literal toilets.. no where else in my travels. Even poo city San Francisco keeps BART relatively clean in my experience.