How Did They Build That? (2021)

Floating Parks & Upcycled Towers (4x10)

Air date: Oct 04, 2025

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.