Unlike Montréal (much more a working city) one of those "UN heritage" places. You are well advised, as a general rule, to stay away from them. The inner city, enclosed by a city wall, is an agglomeration of junk souvenir shops and awful, awfully overpriced restaurants. They're not all awful; for example, there was a pretty good Denny's.
They're terribly fond of their chateau dominating the city. It has a nice view, but you have to look away from what, come right down to it, really is a giant kitschy monstrosity of a hotel. They think so much of that thing, you find replicas all over town. We dubbed it chateau horreur - sure, tastes differ.