Chicagoland here we come
All of the tourism in Illinois seems to be driven by Chicagoland tourism. That seems to be the one destination city in the entire state and the other attractions seem to just catch the visitors that are on the way to the city, not ones that are heading to their attraction. Of course that is out of state tourists. Being the largest city in the state the in state tourists come from Chicago. Sometimes they just want to get out of the city and they support the other attractions around the state. I guess out of state feeds Chicago and Chicago turns around and feeds all of the out lying areas.