
Next episode, a futuristic transportation hub faces construction hurdles in N...
In the next episode, a revolutionary skyscraper with undulating balconies challenges the architectural status quo in Chicago. Meanwhile, massive drilling machines carve out an astonishing 26 miles of tunnels for a subterranean railway system beneath the streets of London.
Seasons: 3
Current Status: Returning Series
Network: Smithsonian Channel
Genres:Reality-TV, Documentary