5. Tianmen Skywalk, China
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Clinging to the sheer cliffs of Tianmen Mountain at nearly 4,700 feet high, the Tianmen Skywalk is a glass-bottomed bridge that offers a vertigo-inducing view straight down into the valley. Just three feet wide, walking across it is a heart-pounding adventure, perfect for adrenaline junkies seeking stunning vistas and a daring rush with every transparent step.
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