@CNN: “Floating” treads and whiplash-inducing spiral structures? Take a look at some of the most extreme staircases from around the world: https://t.co/KlZidPMrSc via @CNNStyle https://t.co/CkL34vZ6GH

February 6, 2018 / The Arbiter / CNN

@CNN: “Floating” treads and whiplash-inducing spiral structures? Take a look at some of the most extreme staircases from around the world: https://t.co/KlZidPMrSc via @CNNStyle https://t.co/CkL34vZ6GH

"Floating" treads and whiplash-inducing spiral structures? Take a look at some of the most extreme staircases from around the world: https://t.co/KlZidPMrSc via @CNNStyle pic.twitter.com/CkL34vZ6GH

— CNN (@CNN) February 6, 2018

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