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How Did They Build That?

Season 4 · Episode 7

Summit & Submerge

0.045mSeptember 14, 2025

A mountain-top centre defies extreme altitude. A stunning museum is sunk into an old dock. And a 600ft tower with floating gardens rises in Singapore.

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Episodes

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