Pittsburgh is located on the Allegheny Plateau, where the confluence of the Allegheny River from the northeast and Monongahela River from the southeast form the Ohio River. The Downtown area between the rivers is known as the Golden Triangle, and the site at the actual convergence, which is occupied by Point State Park, is referred to simply as “the Point.”
The city features 151 high-rise buildings, 446 bridges, two inclined railways, and a pre-revolutionary fortification. Pittsburgh is known colloquially as “The City of Bridges” and “The Steel City” for its many bridges and former steel manufacturing base. In addition to the downtown Golden Triangle, the city extends northeast to include the Oakland and Shadyside sections, which are home to the University of Pittsburgh, Carnegie Mellon University, Carnegie Museum and Library, and many other educational, medical, and cultural institutions.
Pittsburgh is the second-largest city in the US Commonwealth of Pennsylvania. It is the 22nd-largest urban area in the United States. The population of the city in 2010 was 305,704, while that of the seven-county metropolitan area stood at 2,356,285. [Wikipedia]