Something that struck me about Chicago is the huge number of really big parking garages. Since nobody lives downtown, everyone has to put their cars somewhere.
Under 20 minutes costs $6. 21-40 minutes jumps to $16. An hour is $20, and an hour and twenty minutes costs $25. More than 81 minutes will cost $32, with an extra $2 if it goes longer than twelve hours.
Seems a little expensive to me.