London's Mass Transit
Below the streets of London and Paris however, is a labyrinth of tunnels and passageways. Like the tunnels of an ant farm, many people ride the "tube" or "underground". Occasionally you find a few stations above ground, as in this photo from London, but most will be below ground, accessed by curbside stairways scattered around town. During rush hour, you better move fast, as tunnels and trains get crowded. Concentrating on their route, people have "tunnel vision" doing their best to get to their next connecting stop or final destination.