The world's littlest skyscraper https://en.wikipedia.org/wiki/World%27s_littlest_skyscraper
A confidence man sold investors on the building, hoping that they wouldn't notice that the building was to be 480 inches high, not feet. He had left town by the time construction was completed. Subsequent lawsuits did not succeed.
The social network of the future: No ads, no corporate surveillance, ethical design, and decentralization! Own your data with Mastodon!