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How Did They Build That?

Season 4 · Episode 3

Speedcore & Steambend

0.045mAugust 10, 2025

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.

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Episodes

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Episode 1Space Stations & Super Inventions
Episode 2Medals & Marinas
Episode 3Speedcore & Steambend
Episode 4High Waters & Harsh Winds
Episode 5Ecobuilds & Earthquakes
Episode 6Shipyards & Slender Builds
Episode 7Summit & Submerge
Episode 8Facelifts & Scaffolds

Episode 9

Super Stadiums & Extraordinary Elevators

Episode 10Floating Parks & Upcycled Towers