There's plenty of WTF things you'll find upon digging in, such as his partner and her children (and other friends) being axed to death by a servant at one of his early compounds, and his time in Japan building the Imperial Hotel to be earthquake resistant - only for it to be hit by a 7.9 on its opening day, and being one of the few structures to survive mostly intact in all of Tokyo.
And with Fallingwater, after lying to his client that the design was complete, the client basically said, “great, I’m coming over.” Wright hadn’t produced anything - it was all in his head. According to his assistants, he worked feverishly over the next couple hours, putting the design to paper with virtually no mistakes - floor plans, elevations, scale drawings, site modifications - so that by the time the client arrived, it looked fully realized. A project of that scope would normally take months of work and dozens of revisions, but Wright had spent the better part of a year building it entirely in his mind, mostly on site visits just staring at the waterfall for hours at a time.
