Three miles off the coast of Japan sits a gargantuan monument to human ingenuity and ambition. The size of two and a half thousand football fields, it incorporates the world’s longest building and took an estimated 10,000 workers ten million man-hours to build.

Kansai airport typically processes 920 flights and more than 30 million passengers a year. Not bad, when you consider it’s already sinking below the choppy waters of the bay of Osaka.

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How Japan Built The World's Largest Floating Airport