Engineers are racing against the clock to build the world's biggest airport, Beijing Daxing International Airport. Using cutting-edge construction methods, experts put the finishing touches on a modern-day marvel that will move 100 million people in and out of Beijing every year.

The world's highest bridge, China's Beipanjiang First Bridge, impossibly spans an 1,854-foot chasm known as the Crack in the Earth, and to build this engineering marvel, experts use cutting-edge construction technology that can conquer the deadly cliffs of this rugged environment.