In May, I set foot on the highest residential terrace in the world, the outdoor space of the penthouse at the Central Park Tower in New York City. A part of the so-called Billionaires’ Row, Central Park Tower is among the tallest buildings in the world, and its exterior is primarily glass. As I sipped a glass of Dom Pérignon standing 1,416 feet above the ground, alfresco, I looked back at the building and wondered: How do you clean these windows?
Someone has to wash the windows and polish the facade. For the super tall skyscrapers of the world, that someone is sometimes a robot.
