The Platypus used to be considered a myth like Bigfoot and the Yeti.
18
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.
78
A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
Since 1982, a radio frequency emanating from Russia has been broadcasting a buzzer-like sound and, periodically, an unknown voice reads orders, names, and numbers. No one knows where exactly it is coming from or what it means.
13