Pittsburgh is the second largest city in the U.S. Commonwealth of Pennsylvania. 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. Currently there are 446 bridges are in Pittsburgh – makes it the city with most bridges in the world.
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