Insane Megaprojects that were Never Built<br /><br />#Megaproject #Building #Construction<br />From the Tallest Failed Skyscraper in America to the most Insane Airport Megaproject ever proposed, and from the World's Largest Dome to the Mile-High Illinois Skyscraper, here are the Most Insane Megaprojects that were Never Built!<br />
