Have you ever driven into a town and seen their giant water towers? Have you ever wondered how they work? Hear about it at urban legends and stranger truths. As infrastructure goes, water towers are pretty picturesque. Some people turn them into houses once the city no longer needs them. The designers at Pop chart labs once created a visual ode to New York City's water tower taxonomy. But what exactly does a water towers need to be storing hundreds of feet above the city for?