Aired: Apr 13, 2003The construction of Sky City, a revolutionary skyscraper, is underway in Japa...

The next episode explores the massive "Big Dig" project, where engineers worked tirelessly for 30 years to relocate two interstate highways 120 feet beneath Boston, overcoming unprecedented obstacles with creative solutions.
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Seasons: 9
Network: Discovery
Production Country: United States
Genres:Documentary