Forbes Field was the home of the Pittsburgh Pirates from 1909-1971. It was located on the University of Pittsburgh campus. Once Three Rivers Stadium opened, Forbes was demolished to make way for Pitt's student union building. The former site of home plate is located inside the building.
A short distance away from the building, a portion of the outfield wall and the flagpole were left in place.
There is also a brick line that outlines the former outfield wall.
See more of the Forbes Field site at StadiumPage.com