9 Tymor
158 Pennod
MegaStructures - Season 8 Episode 32
To save one of the most iconic engineering wonders of all time requires the creation of another masterpiece: the Hoover Dam Bypass Bridge.
- Blwyddyn: 2012
- Gwlad: United States of America
- Genre: Documentary
- Stiwdio: National Geographic
- Allweddair:
- Cyfarwyddwr:
- Cast: