Towering at over 1,800 feet the CN Tower is the tallest free standing structure in the Weste…

CN Tower - Wikipedia

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CN Tower - Wikipedia

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The World's Tallest Freestanding Towers, 2013-01-02, ENR

See the Incredible CN Tower - HubPages

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The CN Tower, once the world's tallest, soon won't even make the top 10

CN Tower - Wikipedia

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