The subway system that's about more than
traveling.

2.NY subway- Subway Gaga workshop by Barneys
 
It would be grossly unjust to leave out the city whose subway system, at least, never sleeps. New York City's MTA subway lines are doubled up so all station and express trains can run simultaneously along the same routes, 24 hours a day.
And even when carrying out major work on a line, only a single track is decommissioned, leaving a reduced but still-open service. That's planning.
Extra points must go to New York City for the MTA's Music Under New York program, supporting local musicians, now in its 27th year.