Smithsonian Magazine has published an article archiving some of Rem Koolhaas's un-built skyscraper designs. The unrealized designs range from schemes on hold to projects that never progressed past the conceptual stage.

"Compared to the rest of Koolhaas’s oeuvre, these buildings are subtle," the Magazine writes. "They’re witty and architecturally striking without being abrasive. Koolhaas has a genuine affection for the classic commercial high-rise. He sees it as a product of our cultural and political environment."

The projects are a series of innovative approaches to high-rise design. Their proposed locations are Paris, Bangkok, Mumbai, New York, Guangdong and Jersey City.

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