Three Rivers Heritage Trail..maintained by the amazing "Friends of the Riverfront" is no doubt an amazing part of Pittsburgh. The trail extends over 20 miles. There are so many entrances to the trail - makes it effortless to find and enjoy. I work in the north shore and visit the trail several times a week and just love it. Its nice being by the river and watching the boats go by and also to take great snapshots of the amazing scenery. The trail is often referenced "North Shore Trail" or "Riverfront Trail" .. no matter what you refer to it.. its a big part of Pittsburgh.
To me its no doubt one of the favorite reasons why I love living in Pittsburgh.