Impossible Engineering - Season 6 (2019) (kausi)
Yhdistynyt kuningaskunta,
2019, 42 min
Juonikuvaukset(1)
The first railroads in the United States were engineering marvels built to conquer America's deadliest places. Using cutting-edge science, engineers and builders changed the nation by connecting the California frontier with the rest of the country. (Science Channel)