Explore the dark history of H. H. Holmes, often cited as America's first documented serial killer, who capitalized on the frenzy of the 1893 Chicago World's Fair. Holmes lured victims into his infamous "Murder Castle," a three-story building constructed with trap doors, hidden chambers, and a basement specially designed for torture and disposal. We dissect the sinister legacy of Herman Webster Mudgett, a master con artist and murderer whose chilling crimes shocked the Gilded Age and cemented his place as the original "Beast of Chicago."