Mysteries at the Monument: Temporada 2, Episódio 6

2 - 6: Kecksburg Space Acorn; Skyscraper Swindle; Emperor of the US

Don Wildman inspects a bizarre acorn-shaped sculpture that commemorates an otherworldly event; the world's smallest skyscraper, which was at the heart of an outrageous scam; an engineering wonder inspired by an eccentric figure.