Social climbing © Paparacy/Shutterstock
March 2019 saw the opening of a structure called "Vessel" that overlooks the Hudson River in New York. "Vessel" is a 16-story, honeycomb-looking staircase that’s meant to be climbed. Its 154 flights of stairs are interconnected, much like Indian stepwells, which lent inspiration to designer Thomas Heatherwick. Not to worry. For those who would rather skip the 2,500 steps, they can reach the top via elevator.