With available landspace running low, a 1-million square-meter underground development is being planned in Amsterdam.
"Dutch engineers have unveiled plans for a £1bn underground city beneath the canals of Amsterdam.
Engineer Strukton, architect Zwarts & Jansma and the Delft university of technology have drafted a proposal for a 1 million m2 six-level underground development to provide retail, leisure and parking facilities.
The *1.5bn (£1.1bn) project, called Amfora, was proposed to address the lack of space and the high price of land in the city. It is is being discussed with Amsterdam's council, but construction work is unlikely to begin before 2018."