I deliberately picked spiral ramps as opposed to spiral staircases, since they include buildings whose entire form is determined by the ramp rather than being merely a feature. Examples include everything from the Guggenheim to the Reichstag, the Tatlin Tower, Lingotto Factory or Lubetkin’s brilliant Penguin Pool at London Zoo. My personal favorite is the spiral ramp at Convair Aeronautics, by Pereira and Luckman, the people that designed the now defunct control tower at LAX. The insane but amazing proposal for a half mile high drive up skyscraper for the 1937 Paris exhibition is one example of a spiral ramp car park, and I’ve thrown a few examples of anonymous car park ramps into the mix to show how beautifu these often overlooked pieces of background architecture are.