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5) Mackinac Bridge (5 of 10)
5) Mackinac Bridge (5 of 10)
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The Mackinac Bridge might not look that bad, especially when compared to some of the other dangerous bridges in this slideshow. However, the Mackinac Bridge is the 5th-longest suspension bridge in the entire world, and the entire bridge moves as far as 35 feet away from its center during heavy winds.