Rem Koolhaas's plans for the new Serpentine Pavilion in Kensington Gardens, London, are simply fascinating. The pavilion's roof will be "a giant, helium-filled, translucent canopy, which will rise and fall depending on weather conditions. When it is cold and windy, it will lie low; but on fine days, the cables holding it down will be loosened, and its bulbous form will rise like a balloon, higher than the gallery itself. There are some climactic justifications for this bizarre structure [...] but it is essentially a joyous extravagance that stretches the definition of built form a little further." Read the Guardian's article: The Gas Ceiling.