Complicated is the first world that entered my mind when I saw London’s Tube Map the first time. But it didn’t took us long to comprehend which train goes where. And suddenly, London’s Railway system became a blessing as we were literally in and out of the tube as we visited various tourist spots.

And just how busy London is compared to other countries, I have no idea. Let’s see London, New York, Hong Kong, Philippines and Japan’s Railway System (respectively from left to right) and let the images speak for themselves.