How Did They Build That?

A Manhattan skyscraper designed to appear as if gust of wind could topple it over. A Paris museum described as an engineer's "jigsaw puzzle from hell," with 3,500 individually designed glass panels. And a cliffside elevator in Zhangjiajie so remotely located, it had to be built entirely by hand. Join us as we travel the globe to witness astonishing structures that pushed architecture and the laws of physics to the edge. Then meet the brilliant minds who designed and built these wonders and discover the stories behind their construction.

A bent Manhattan building that actually caused panic in the streets. A cultural center in Athens that features a massive floating roof in an earthquake zone. A university complex in stifling Singapore that was built without air conditioning. In this episode, we examine the American Copper Building, the Stavros Niarchos Foundation Cultural Centre, and "The Hive" at Nanyang Technical University, meeting the brilliant minds who designed and built them, and revealing their engineering secrets.

From a logistical railway nightmare to an indoor tropical dreamscape, watch engineers and builders complete the impossible.

Travel to a French valley, a Shanghai quarry, and the middle of Milan and witness architectural and engineering wonders.

Watch architectural and engineering minds defy gravity and create artistic wonders in Belgium, Scotland, and Manhattan.

Take a trip to Rotterdam, Guangzhou, and London and witness astounding feats of design and engineering.

Traveling to New York, Denver and Nice, France to visit Little Island, the Denver Museum of Art and La Tête Carrée and revealing how they were built.

Engineers explain the constructions of architect Santiago Calatrava's university building in Florida, architect Frank Gehry's museum in Spain, and cultural center The Shed in New York City.

Experts explain the engineering behind the creation of architect Norman Foster's Hearst Tower in NYC, Jewel Changi airport in Singapore, and architect Yann Weymouth's Dali Museum in Florida.

See the architectural secrets behind a Canadian school on stilts, a sports museum that traces Louisiana’s history and an opulent train station in Belgium.

A glass bridge arcing over the Grand Canyon, the weather-resistant Audain Art Museum in Whistler, Canada, and Zaha Hadid's university library in Vienna are explored.

The innovative designs of the gravity-defying Vancouver House, the subaquatic Under restaurant and the cantilevered Seattle Central Library challenged engineers to think outside the box.

A sculptural new transportation hub for New York's World Trade Center is beset by challenges. Then, Amsterdam gains a striking building inspired by a mountain valley, and a new launchpad for space travel prepares for liftoff.

A gravity defying university building in Sydney, Australia, is clad in 320,000 bricks. Engineers grapple with making an angular arts center tornado proof in Oklahoma. And a plant-filled office building.

Engineers grapple with an apartment building, ripped apart by a man-made canyon. The iconic Gateway Arch takes shape in St Louis, Missouri. And an unpromising plot in Copenhagen is transformed by a gleaming new triangular office building.

A dazzling new 1400 foot tapering skyscraper is built right next to New York's Grand Central. A curving wine museum requires ingenious engineering in Bordeaux, France. And possibly the world's most glamorous parking garage.

A 1.2 million square foot office building balances precariously on a 39 foot wide base in Chicago. A building named Pterodactyl lands on top of a Los Angeles parking garage. And the world's longest suspension footbridge is constructed in Czechia.

A new Olympic and Paralympic museum tests engineers with its trailblazing accessible design. A dazzling curved glass skyscraper battles gravity in Milan. And a student center built under a noisy railroad.

Lives are on the line creating the International Space Station, a scientific marvel a decade in the making, that changes the way we look at the world.

A floating museum honors military heroes in Texas. A sky-park casino balances on six towers. And an office is carved out to protect NYC's High Line.

A railway-spanning library mimics the clouds. A speed-core skyscraper is built in record time. And a world first bridge inspired by a child's toy.

Apartments hanging 164 feet above the water defy gravity in Amsterdam. A trio of towers shimmer on Chicago's skyline, and museum design is revolutionized in Paris.

An airport gets a 9 acre roof without stopping flights. A museum is buried in the desert to keep it cool. And building San Fran's most hated tower.

A 284ft timber tower tests fire safety limits. An old crane tracks is reborn as sleek glass offices. And 28 apartments are stacked on a 21ft plot.