Explores how Britain's National Gallery, The Tate, stepped in to help the Bankside on the southern shore of the River Thames.

Explores the St Louis Rail Station, and how it went from being the biggest in the United States to falling into disrepair.

An old and deserted dry dock is transformed into an amazing subterranean museum, after the engineers drain the entire ground and build a new concrete base.

A look at the Port Building, a stunning, gravity-defying office complex building that appears to hover over a 19th-century fire station, and uses a borehole energy system that makes it one of the most energy efficient buildings in Europe.

The story behind the Seoullo 7017 overpass, a 1km bridge that once symbolised the polluted heart of Seoul and has been turned into a garden home to 24,000 indigenous species of plants.

First constructed in the 1930s, the West Side Line, an elevated viaduct section of the New York Central Railroad, was abandoned in the 1980s.

In Hong Kong, an old WWII detention centre is transformed into a gleaming new university, while respecting the old buildings beneath.