There is an island near Italy that was the site of wars, a dumping ground for plague victims, and an insane asylum. It's considered so dangerously haunted that the Italian government does not allow public access.
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A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
There are pictures of Knights fighting Snails in old Medieval manuscripts - and nobody knows why.
23
In 1958, a nuclear bomb was lost somewhere along the swampy coast of Georgia. Its whereabouts remain a mystery to this day.
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