6. Iya Kazurabashi Bridge, Japan

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Spanning the scenic Iya Valley in Tokushima, the Iya Kazurabashi Bridge showcases ancient craft. Woven mainly from mountain vines, it traces an 800 year legacy, first aiding locals across the gorge.
Though vine footing seems risky, routine upkeep and hidden steel cables refreshed every three years ensure safety. Stretching 45 meters (148 feet) and hanging 14 meters (46 feet) above the stream, its gaps and sway stir excitement.
It draws travelers seeking rural heritage and dramatic mountain views.