The Lucky Knot bridge in Changsha, China is a topologically fascinating structure. It's effectively three bridges woven into one and it has no beginning and no end https://t.co/uywNdJgMoF pic.twitter.com/PbNsMdtINA
— Massimo (@Rainmaker1973) December 30, 2017
(Tip of the cap to Henry Segerman.)
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