On a recent trip to Pittsburgh the tourist in me talked my former resident companions into going on the incline (a funicular). After trying to figure out where to park for it, we arrived to a tiny old building with no A/C and no ventilation whatsoever.
Still, it was fun, historic, and a new experience for all of us - so we endured the pass-out-inducing heat for 30 minutes while the cars exchanged their position along the incline.
Once at the top of Mt. Washington (I think that's what it's called), we took our panoramic pictures and headed to scope out the neighborhood (and find a beer to replenish the 10 pounds we lost sweating on the incline).
The incline was definitely something I would recommend to other visitors to Pittsburgh - it gives you a wonderful historic experience and an even better view - just bring along one of those water-spraying-fan things or avoid it during the heat of summer!
Also - bring exact change - they don't make change for you!