The Maeslantkering is a storm surge barrier on the Nieuwe Waterweg, in South Holland, Netherlands. Controlled by a supercomputer, it automatically closes when Rotterdam is threatened by floods. Part of the Delta Works, it is one of largest moving structures on Earth, rivalling the Green Bank Telescope in the United States and the Bagger 288 excavator in Germany.
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Address 3198, Netherlands
Coordinates 51°57'10.744" N 4°9'38.739" E