Knid, in this thread of the EN World city project, on page 3, some folks have posted pictures of various structures in the town. These are mostly photos found on the web. If you wanted to do your own versions of any of these, it would be really cool. There is also a bridge that no one had found an image for. It's probably going to be called Highbridge, and will run from an island in the river to one of the banks. It has to be high enough for ships to pass under, or else it could be a drawbridge, I suppose. Would you be interested in playing around with that idea when you get a chance?
Generally, the geography thread might interest you.