![Extreme Engineering](https://image.tmdb.org/t/p/w342/y2Ojs6gFwVhJvGA3MsPgVJOYT0U.jpg)
9 Season
77 Episode
Extreme Engineering - Season 1 Episode 9 Boston's Big Dig
Boston's new transport system, which features a multi-lane underground highway and the world's widest cable-stayed bridge
- Year: 2011
- Country: United States of America
- Genre: Documentary
- Studio: Discovery
- Keyword: engineering
- Director:
- Cast: