Best value for the tourist in me (and you)!
I highly recommend the Duquesne Incline, especially to new-comers or visitors. It was just the ticket to get my bearings and know where I had been and where I wanted to go next in downtown Pittsburgh.
At the time of this post, the fee was a mere $4.50 for an adult for a roundrip ticket aboard the cable car to the top of the Mt. Washington neighborhood. It was another 50 cents for a self-guided tour of the inner workings of the cables that work the cars. The best part? The views! Specatular views of downtown are to be had so click away taking all those photos to post on FaceBook.
An added bonus? Get all the free brochures together in the shop at the top and you'll find a jewel of a map of the city from the bicycle rental company. You'll be able to locate items on the map to match what you're looking at.
While you're at the top, don't pass the chance to dine at one of the restaurants with a view. Check out my review for the Grandview Saloon nearby which has an outdoor deck.
Note also there's a free parking lot for the Incline but also note it contains quite a few steps to the loading deck in case that's of significance to you.