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.

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.

Experts explain how engineers built the world's steepest funicular railway in the Swiss Alps and how construction of Zaha Hadid's residential high-rise in Miami overcame a hurricane.

We visit London’s Gherkin, Seattles’s Evergreen Point floating bridge and Lyon’s Mysee des Confluences to uncover how and why they were built.

We visit Australia’s One Central Park, The Oslo Opera house and the California Academy of Sciences in San Francisco to reveal their architectural secrets.

A look at the design and engineering stories behind DC’s Museum of African American History, the Montreal tower and the Equinor building in Oslo

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.

Architects and engineers build an eco-friendly convention center on Vancouver's waterfront, a lift bridge in Bordeaux and a cocoon-shaped skyscraper in Tokyo each with unique challenges like marine habitats and massive spans.

A sculptural high-rise with rippling balconies breaks the mold in Chicago. Mammoth machines bore 26 miles of tunnels for an underground railroad beneath London's city streets.

A new performance center with a tent-like glass-and-steel lobby tests engineers in Kansas City; two twisting apartment towers make heads spin in Ontario.

The American Museum of Natural History gets a cave-like extension; Boston University gains a tower.