It was built nearly a century ago as one of the most innovative mega projects of its time.
The 32-kilometre Enclosure Dam in the Netherlands has served to protect the nation from the sea.
But now, rising water levels and increasing storms mean the government is having to enhance the structure.
Al Jazeera’s Step Vaessen reports from the Affslow dyke Afsluitdijk (af-slow-dyke) in the Netherlands.
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