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9 of the world's most extreme streets

By: John Donovan on March 29, 2016, 11:46 a.m.

Photo: Kathrin Mezger/flickr

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The narrowest: The Spreuerhofstraße

Let's be honest here: The Spreuerhofstraße in Reutlingen, Germany, is little more than a crack between buildings. But what's good for the Guinness Book of World Records is good enough for us, and Guinness says this is the world's narrowest street.

Barely a foot wide at its skinniest, ballooning to 19 inches or so at its widest, you'll need to leave your bike at home to get through.