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7 Wonders of the Modern World

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maeslantkering

Netherlands North Sea Protection Works


Because the Netherlands is below sea level, a series of dams, floodgates, and surge barriers have been built to keep the sea from flooding the country during storms. The biggest part of the Netherlands North Sea Protection Works was a two-mile-long moveable surge barrier across an estuary finished in 1986. It is made of 65 concrete piers each weighing 18,000 tons. It has been said that the project is nearly equal in scale to the Great Wall of China.

Next: Golden Gate Bridge

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