29:02
Pittsburgh Travel Guide - City of Bridges
54:13
The Race to Save New York's Crumbling Infrastructure
43:35
The Story of Chicago: Crossroads of America
44:35
Building the Tallest Bridge - How Did They Build That? - S01 EP04 - Engineering Documentary
17:40
Explore Pittsburgh PA's Neighborhoods & Tourist Attractions
50:04
Connecting Our World: The Greatest Bridges Ever Constructed
18:03
Pittsburgh - the most surprisingly wonderful city in America.
55:26