Do monsters only exist in the movies? Well maybe.
but people have told tales of monsters for years.
Bigfoot, for example - a large, humanlike creature rumoured to live in western North America.
Similar creatures are said to live in Asia, South America and Africa.
And that's not all - unexplained creatures, from zombies to swamp monsters, have tales of their own.
Are they real? Is Bigfoot a guy in a monkey suit or is something really lurking in those dark woods? Is the Loch Ness monster a floating tree trunk or a prehistoric monster? No one knows for sure.