The Weiner's Circle is always a stop on any tourist's agenda in the Big Spud, if they eat meat.
Note, the ketchup is for the french fries only, no self-respecting man puts ketchup on a hot dog (or char-dog in this case). Other Chicago dog ingredients of note: day glow relish, tomatoes with a sprinkling of celery salt, bright yellow mustard, pickle, hot peppers. Mmmmmmm, grease...