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7 Wonders of the Modern World

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Panama Canal

It took 34 years to create this 50-mile-long canal across the Isthmus of Panama. The amount of digging required and the size of its locks helped make it the most expensive project in American history at that time—and the most deadly: About 80,000 people died (most from disease) during construction of the Panama Canal.

Next: Channel Tunnel

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