We look to the urban spaces below our feet, exploring the tunnels, passageways and even catacombs that exist under the buildings and roadways of our cities.

More from the world’s leading real estate event – Mipim
29:54

Tall Stories 500: Shadows of Errol Flynn in Mallorca
05:34

Meet the mayors at Mipim, the world’s leading real-estate event
44:38