Project Impossible

On this ep: the largest moveable building in history; a super-tall skyscraper built to withstand killer earthquakes; a bridge being raised while it stays open to traffic; a next-generation sports stadium inspired by ancient Roman temples.

Throughout history, mankind has built amazing structures, engineered to overcome unique challenges.

America has a history of building the impossible. Across the nation, a new generation of impressive projects is underway.

Toppling giants of concrete and steel is dangerous and deadly. In demolition, one mistake can cost you your life.

Engineering revolutions make today's technology seem outdated. On this ep: world's fastest production motorcycle (Lightning LS-218); a "train" faster than the speed of sound (Hyperloop); the world's first nuclear fusion power plant (ITER).

In South Dakota, an abandoned gold mine is used to study the universe. London is building a "silent" rail to prevent gridlock. Mexico City is burrowing 39 miles underground to save from it drowning.

Engineers are going to extreme lengths to keep the lights on: harnessing the power of the longest river on Earth, tapping into the raging heat of a live volcano, and building one of the largest offshore wind facilities in the world.

On this episode: building a nuclear-powered icebreaker in Russia; laying the first trans-arctic cable in Alaska; constructing a modern airport on Baffin Island; building a permanent highway in the middle of arctic winter.

Underwater archaeologists search for a WWII Nazi sub in U.S. waters. In Scotland, researchers dig up ancient rocks with cryptic markings that could reveal who built Stonehenge. On this episode: German Submarine U-576; Cochno Stone; LIDAR.

As humans push even further into the world's most extreme environments, a new breed of tools allows man to face these deadly forces. On this episode: polar survival suit; thermal imaging fire fighter mask; big wave surfing emergency vest.

A new class of superstorms could cause great cities like New York to simply disappear. On this episode: Venice flood barrier; underground Tokyo water diversion tunnels; storm defense; Tsunami Machine.