Pittsburgh, Allegheny County, Pennsylvania, USA

Pittsburgh is the seat of Allegheny County in southwestern Pennsylvania. The Allegheny and Monongahela rivers meet there to form the Ohio River. The city was named in 1758 in honor of British statesman William Pitt. It incorporated as a borough in 1794 and as a city in 1816. The Three Rivers Heritage Trail connects riverfront parks, neighborhoods and former industrial areas.