Impossible Engineering Episode 4 preview

Duration: 02:35

In 1609 Dutch architect Jan Adriaanszoon Leeghwater came up with an ingenious solution to solve the problem of flooding in the Netherlands, using 42 windmills to drain the 70 sq km Beaminster lake.

Find out how engineers in Japan then took Leeghwater's principles of reclamation one step further when building Kansai Airport.

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