This series of hand drawings by Bartlett School of Architecture graduate Ned Scott presents a science-fiction world in which London grows a jungle of crops for fuel and food next to Buckingham Palace. More
Tornados would pose no threat to this conceptual house by architects 10 Design, which can tuck itself beneath the ground just like a turtle retracts its vulnerable head away from danger (+ movie). More
Algae would produce energy and clean water for a conceptual skyscraper proposed for London by British architect Dave Edwards. More
This conceptual skyscraper by Brazilian architects Projeto Coletivo would be constructed using rubbish in the city of São Paulo. More
The stark concrete exterior of many of London's postwar housing blocks could be made more attractive with thatching, proposes architecture student James Kirk (+ movie). More
This movie by Jonathan Gales of architectural animation studio Factory Fifteen imagines the whole of London as a construction site, caught in a state of change that could mean dramatic decay or intensive development. More
A spiky kindergarten and a bulbous sports centre with rooftop funnels are included in this conceptual community by architecture students at Lund University, Sweden. More
If you're not worried about where you go or how fast you get there, this enormous inflatable cloud is the mode of transport for you. More
Architecture graduate Stephan Sobl has designed an upside-down skyscraper to hang over the Colorado River in Nevada, right beside the Hoover Dam. More
Rotterdam studio STAR Strategies + Architecture have photoshopped green walls over images of iconic buildings to poke fun at the way architects believe cladding a building in plants makes it sustainable. More
These conceptual images by Spanish studio Espai MGR show impossible Lego structures filling vacant neighbourhood plots in Valencia. More
Architecture students Felix de Montesquiou and Hugo Kaici have designed the headquarters for a conceptual company that would help customers migrate illegally from Europe to the UK. More
Belgian architect Vincent Callebaut has designed a conceptual transport system that would involve airships powered by seaweed. More
New York designers Studio Lindfors have created a series of images imagining how New York and Tokyo might look like in a few hundred years as a result of rising sea levels. More
San Francisco architects IwamotoScott have won a competition to propose a futuristic vision of their city, organised by the History Channel. More