GoogleSightseeing.com brings us: the World’s Largest Swimming pool.
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Located in Chile, this massive manmade monstrosity is 1 kilometer long – more than 80,000 square meters – and contains 250,000 cubic meters of water. And, to further solidify itself in the “Completely Unnecessary” category, it’s immediately adjacent to … wait for it … the sea.
Hat tip: Nubricks.com