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Wikipedia: 311 South Wacker Drive in Chicago, USA, is a post-modern 65-story skyscraper completed in 1990. At 961 feet (293 m) tall, it is the sixth tallest building in Chicago and the 15th tallest in the United States. It was once the second tallest reinforced concrete building in the world (after Two Prudential Plaza, also in Chicago).
![[311 South Wacker Drive viewed from W]](http://images.ookaboo.com/photo/s/311_South_Wacker_Drive_28Chicago_2C_IL_29_29Nov2007_s.jpg "311 South Wacker Drive viewed from W")
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![[311 South Wacker Drive, Chicago, Illinois photographed from Adler Planetarium]](http://images.ookaboo.com/photo/s/311SouthWackerDr_s.jpg "311 South Wacker Drive, Chicago, Illinois photographed from Adler Planetarium")
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 from Ingvar-fed |
from Patrick Pelster |
![[311 South Wacker Drive top viewed from the top floor of Willis Tower]](http://images.ookaboo.com/photo/s/311_South_Wacker_Drive_28Chicago_2C_IL_29_from_the_top_of_the_Willis_Tower_29Nov2007_s.jpg "311 South Wacker Drive top viewed from the top floor of Willis Tower")
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![[311 South Wacker Drive as viewed from the 57th floor of the Chase Tower]](http://images.ookaboo.com/photo/s/311_S_Wacker_Dr_081307_s.jpg "311 South Wacker Drive as viewed from the 57th floor of the Chase Tower")
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from Ingvar-fed |
 from Hyperion924 |
![[A picture of 311 South Wacker Drive]](http://images.ookaboo.com/photo/s/311_South_Wacker_Drive_060528_s.jpg "A picture of 311 South Wacker Drive")
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from JeremyA |
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