Definitely a must do activity if you're visiting Pittsburgh!
Take the cable car to the top of Mount Washington and walk along Grandview to the Dusquesne Incline which you can take down. Enjoy the spectacular views of the Pittsburgh Skyline! There are several observation decks along Grandview and the photograph opportunities are amazing. Highly recommended both during the day and at night.
*** Park your car in a lot on Carson. Make sure you have exact change for the incline. Spend some time at the incline station on Grandview.