The statistics of the New York City subway system are overwhelming: divided into 21 lines, utilizing over 800 miles of trackage, and ridden an average of 5 million time on weekdays alone. NYC has the largest number of subway stations – 468 – of any public transit system in the world. Not surprisingly, the Times Square station (with multiple lines) is the busiest station, and the other station rankings can be found here.
Some “stations” like Times Square, Grand Central, Union Square, and Penn Station actually straddle multiple lines so there’s some walking required underground to transfer between the individual stops. These station “complexes” are usually swarming with people criss-crossing in every direction and make the system seem even more confusing, but I swear there is a logic to it, in most cases.