Documents Pittsburgh's status as the "City of Bridges" (it has more bridges at 446 than any other city in the WORLD). Includes background on the history and typ

Pittsburgh is the "City of Bridges," and what remarkable bridges they are The area's challenging topography of deep ravines and mighty rivers--the Monongahela,

Pittsburgh's Bridges takes a comprehensive look at the design, construction, and, sometimes, demolition of the bridges that shaped Pittsburgh, ranging from the