June 21, 2011, 7am PDT
Modern Mechanics Magazine featured a strange idea for circulating people throughout a shopping mall called the "Revolator" that moved people up and around in glass boxes so they could see into stores.
January 15, 2009, 6am PST
Want to get kids off the street? Build playgrounds on top of skyscrapers, like in this retro-future design from 1957's Mechanix Illustrated.