For the Pittsburghers in the thread -- the first weekend I was in Pgh, I decided to go up the Duquesne Incline.
Mind you, I have a terrible fear of heights.
I paid my money, got in, looked up, then got out and told the ticket booth guy that the next person gets a free ride.
I never did go on it, but I drove up Mount Washington many times.
If there is a more sudden breathtaking view than when you come out of the Fort Pitt tunnel, I can't imagine it.