A house of cards, long-time metaphor for tenuousness and pastime of prison inmates, usually doesn't last long. But that's because it's not made out of giant aluminium cards, like New Zealand designer Fletcher Vaughan's giganto-version.
Vaughan says of his work, "The illusion that [the sculpture]could be toppled at any moment by the slight breath of wind represents the fragility of our planet and its inhabitants in the present day." Fine. I think this falls more fairly into the "giant things that look cool" school of sculpture. [DesignBoom]