You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
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There's a swing on the edge of a cliff in Ecuador. It has no safety measures and is called the 'Swing at the End of the World'.
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The full moon causes a tidal wave to roll up the Amazon river once in day and once in night for a period of only three weeks in a year. This results in continuous 4m high wave that can be surfed for up to 13km.
14
Mackinac Island, Michigan, has banned cars since 1898!
4