Extreme Engineering: Collection 2

Biggest, longest, tallest, fastest, most expensive -- these are the operative words in this collection of episodes from the Discovery Channel series focusing on the world's most mind-blowing engineering feats. From a bridge that spans a mile-wide gorge in France to Tokyo's planned Sky City (a vertical urban center designed to house more than 100,000), a trans-Atlantic tunnel and more, the program bears witness to man's triumph over nature.