Google employee Greg Estren dives into the forgotten history of the largest New York City building no one even knows: 111 Eighth Avenue, a 16-story structure bigger than the Empire State Building and Google’s NYC headquarters. But this isn’t just another office building. It was a core piece of the bold plan that would reshape the region’s transportation network, rein in America’s railroad tycoons, create the Port Authority, and save New York. This is its story.