Pittsburgh is the second-largest city in the American state of Pennsylvania and the urban core of the Greater Pittsburgh Region. It is located in the southwest of the state, at the confluence where the Allegheny and Monongahela join to form the Ohio. The city was named in 1758 by General John Forbes, in honor of British statesman William Pitt, 1st Earl of Chatham, and incorporated as a borough in 1794. It developed as a link between the Atlantic coast and the Midwest, and its nicknames include the "Steel City", for its more than 300 steel-related businesses, and the "City of Bridges" for its 446 bridges.
This picture shows downtown Pittsburgh and the Duquesne Incline funicular, viewed from Mount Washington on the city's south side.Photograph: Dllu