This one from North Korea is pretty interesting, was pretty much abandoned and half-derelict for 15 years, now work has started up again in the last couple of years : www.rjkoehler.com/2008/05/20/ryugyong-hotel-its-alive
Habitat 67 is a housing complex,make sure to check out the panorama of it on the wiki, http://en.wikipedia.org/wiki/Habitat_67 Also the UK Pavilion at Shanghai Expo 2010,Its one strange building, check out more images here,…