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Disney/Pixar

The look of the monster city Monstropolis was another challenge for the Pixar artists. Early concept drawings suggested a more traditionally spooky landscape, reminiscent of Halloweentown from 'Nightmare Before Christmas.' But scaring is a job rather than a way of life for the monsters of 'Monsters, Inc.,' so the creepy town was ditched in favor of architecture inspired by the 1960s and earlier.

The idea was that the Monstropolis economy had experienced a boom in the 1960s, but had since experienced a downturn due to the invention of television and human kids becoming more jaded and difficult to scare.