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10. Titlis Cliff Walk, Switzerland

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At the stunning elevation of 10,000 feet above sea level, the Titlis Cliff Walk becomes Europe's highest suspension bridge. Measuring just three feet wide, the bridge clings to the snowy mountain, providing views that prove both magnificent and frightening. Every wind gust and every sound beneath your feet reminds you that you hang above an icy chasm, making this a genuine test for even the boldest adventurers.