Over at io9, they passed along some work by John Ptak over at Ptak Science Books. Our boy Ptak did a gorgeous round-up of retro-future proposed airports. Like everything else retro-future, they’re gorgeous, impractical, and sadly have never come to pass. But that’s okay! Despite the fact that these cities with sheen never came to pass, and the airport could be used in lieu of waterboarding, we can still live vicariously through these pictures. Hit the jump for the other sadly non-existent airports.