Episode 3 Preview | 10 Modern Marvels That Changed America
Preview: Season 2 | 30s
A whirlwind tour of 10 engineering feats that made our civilization possible: from the Erie Canal and Eads Bridge, to the Holland Tunnel and Hoover Dam. Find out which 10 modern marvels made the list.
Aired: 07/24/18Video has closed captioning.