In his 1957 book A Testament, Frank Lloyd Wright described a skyscraper a mile high that he hoped to build in Chicago. Atomic-powered elevators would serve a net rentable area of more than 13 million square feet, with covered parking for 15,000 cars and landing decks for 150 helicopters.

Wright imaged it would be “more permanent than the pyramids,” but the plan was never realized. The 528-story building would have been nearly twice as tall as the Burj Khalifa and four times the height of the Empire State Building.