How Did They Build That? (2021)

Learn how astronauts constructed the International Space Station while circling the Earth at 17,500 miles per hour; look at the meteorproof ship's power source and unique water-recycling technology; discover why it almost wasn't built at all.

Paying tribute to the brave, gravity-defying design of the U.S. National Medal of Honor Museum; travelling to Singapore for a look at a leaning tower of gambling, then exploring a New York City office building that lets the sun shine through.

Peek inside a cloud-inspired library in Canada that's built over a live railway; see how clever engineering helped a huge Seattle skyscraper go up without harming its iconic neighbour, then cross an Australian bridge that floats above a busy river.

Apartments hanging 164 feet above the water defy gravity in Amsterdam. Three rippling towers with the 83rd story left open to prevent it swaying transform Chicago's skyline. And Paris's Pompidou Centre reinvents museums.

Witness amazing buildings, bridges, lifts, and other structures that pushed structural concrete engineering to the edge.

A 284ft wooden skyscraper built from 1,200 bespoke pieces tests fire safety limits in Milwaukee. A decaying Amsterdam crane track transforms into elegant glass offices.

Building an eco-friendly visitor centre in the permafrost on Colorado's Pikes Peak tests the team. A museum is constructed in a disused dry dock that's in danger of collapse.

A new museum building bends 1,100-glass tubes to form a facade and tunnels below the water table. A vast 11-storey glass atrium HQ is built on the former Berlin Wall site to represent unity.

A 70,000-seat stadium defies seismic forces and international flight paths in LA. Zaha Hadid's dramatically twisted 33-story tower rises around ancient vaults in Malta.

On inadequate foundations, San Francisco's MOMA triples in size creating an exterior light enough to prevent collapse. A 1970s Sydney skyscraper is recycled into a 21st century tower. And in Dallas, a 5 acre park is created above 8 lanes of freeway.