Many don't know it, but New York is a city that runs on steam. 27 billion pounds of it per year, in fact. It's one of the few cities that relies on the old, but reliable, technology to heat some of its most famous buildings.
Getting water from upstate reservoirs to the taps of over 8.5 million people in New York City is no easy feat. From purification, through thousands of miles of underground tunnels, this is how New York City gets its water.