'A giant 'digital cloud' that would float above London's skyline has been outlined by an international team of architects, artists and engineers.
The construction would include 120m- (400ft-) tall mesh towers and a series of interconnected plastic bubbles that can be used to display images and data.
The Cloud, as it is known, would also be used an observation deck and park.
The unconventional structure was originally envisaged as a centre piece of the city's Olympic village. Its designers plan to raise the funds to build it by asking for micro-donations from millions of people.
"It's really about people coming together to raise the Cloud," Carlo Ratti, one of the architects behind the design from the Massachusetts Institute of Technology (MIT) told BBC News.