Landmarks

Prior to July 2009, what was the Willis Tower called?

More Questions from Landmarks
What is the name of a church built deep inside a salt mine in Cundinamarca, Colombia?
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You can find The Great Wall at which location?
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In what country is the World Heritage site, Mausoleum of the First Qin Emperor?
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The Eiffel Tower contains 20,000 what?
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What is the name of one of the largest and most important castles in Scotland which sits atop Castle Hill?
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You can find Yankee Stadium at which location?
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What U.S. building was the tallest in the world from 1974 through 1998?
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The Colorado river flows through which landmark?
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