12-Mount Titlis Switzerland -shutterstock_147071486.jpg

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Set alongside the tallest mountain in the Swiss Alps—Mount Titlis, this incredible bridge is a whopping 1,640 feet up from the ground below. Said to be the highest suspension bridge in all of Europe, the views are absolutely stunning, but crossing is frightening to say the least. “To cross the bridge, you'll need nerves as strong as the steel cables from which it hangs,” reads the website.