Watch Modern Marvels Season 6 Episode 30 Online
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- COUNTRIES: United States of America
- Subtitles: English
The task was monumental: Build the world's largest dam in the middle of the desert, and tame the river that carved the Grand Canyon–all in seven years! When the Hoover Dam was completed in 1935, it was the largest dam in the world. We'll reveal how this engineering wonder of the world was conceived and built.
