The former home of America’s first serial killer, H.H. Holmes, is another chilling landmark in Chicago’s haunted history. Holmes constructed a sprawling building in the Englewood neighborhood, known as the “Murder Castle,” which he used to lure unsuspecting visitors to the 1893 World’s Fair. The building’s bizarre blueprint, complete with staircases and hallways that led nowhere, was designed to disorient and trap his victims. While the exact number of people Holmes murdered is uncertain, some historians believe the toll may have been in the hundreds. Today, maintenance workers report odd sightings and feelings of intense anxiety in the building’s basement, where many of the killings took place.