Observatory House / Gabriel Orozco and Tatiana Bilbao © Iwan Baan
© Brett Boardman
© Brett Boardman
© Misae Hiromatsu
© Jason A. Knowles
© Jason A. Knowles
Happy 145th Birthday Frank Lloyd Wright
© Peter Bennetts
© Paul Ott
© Paul Ott
From upper left: Chicago, Beijing, London skylines. Images © Flicr User CC Stuck in Cummons
From upper left: Chicago, Beijing, London skylines. Images © Flicr User CC Stuck in Cummons
© Jose Campos
© Cristobal Palma
© Cristobal Palma
© Erik Hesmerg
© Ludger Paffrath
© Åke E:son Lindman/Otto
© Åke E:son Lindman/Otto
© Patrick Miara
© Patrick Miara
© Courtesy of Hyunjoon Yoo Architects
© Courtesy of Hyunjoon Yoo Architects
© Shinji Otani
© Shinji Otani
© Felipe Ortiz
© Herta Hurnaus, DMAA
© Herta Hurnaus, DMAA