How Did They Build That? · SEASON 4
Summit & Submerge
Episode 7 · 2025-09-14

- Documentary
Episode overview
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.
45 minutes
Season 4 episodes
1. Space Stations & Super Inventions2025-07-27
2. Medals & Marinas2025-08-03
3. Speedcore & Steambend2025-08-10
4. High Waters & Harsh Winds2025-08-17
5. Ecobuilds & Earthquakes2025-08-24
6. Shipyards & Slender Builds2025-09-07
7. Summit & Submerge2025-09-14
8. Facelifts & Scaffolds2025-09-21
9. Super Stadiums & Extraordinary Elevators2025-09-28
10. Floating Parks & Upcycled Towers2025-10-05