On the surface, you’ll step into beautiful 19th-century downtown buildings to hear fascinating stories about the World’s Columbian Exposition, and you’ll enjoy a drink in a century-old bar. Beneath it is a deeper concept of modern architectural theory that all that is built must be destroyed. About Chicago Detours: Since 2010, Chicago Detours offers guided tours of architecture, history and culture that bring people to explore stories and places locals don't even know.