America's 10 most haunted cities

Take a behind-the-scenes National Building Museum Ghost Tour to hear about after-hours apparitions and shape-shifting figures in the building that was originally the restitution office for Civil War widows and children. (Photo: Mick Cochran, USA TODAY)Come take a walk on America's dark side. Bloody battles, shady shanghaiing practices, built-over burial grounds, and natural disasters have left behind an unsettled past in towns throughout the country.