Re: So I'm going to the Burgh...
after thinking about it, scratch the clipper boat ride suggestion. it is more of a casual thing to do when you have lots of time to blow in pittsburgh (it can take up to 3 hours to get there, wait, and take the actual tour). if you did it on your 1st trip, you may be left wondering why you wasted so much time to float on a boat.
the incline ride however is close, totally unique, and can be accomplished in less than 45 minutes (depends on how much time you wanna spend up top to absorb the view).