Here’s an image I made while waiting for the subway in New York City. In a city of millions of people, there was only one other person here.
If you manage to spend a decent amount of time in New York and you’re not rich (meaning you don’t cab it everywhere), there’s a good chance you’ll ride the subway at least once.
The subway system in and around NYC is amazingly extensive and, in most cases, will bring you pretty close to where you need to go. So to me, subways are pretty well entwined with life in NYC.