When you think "fairies," what comes to mind? You probably picture an adorable and sparkly creature akin to Disney's Tinker Bell, a lovely - and above all, friendly - presence. You may even want to make contact with them. Unfortunately, glittering humanoids with butterfly wings are the stuff of children's stories. Retrace faerie folklore, and you'll discover their secret scary origins.
Cultures all over the world put their own disturbing spin on the fay. In Wales, faerie folk take away babies and leave their own twisted offspring in their place. Scottish Kelpies, meanwhile, are known for their taste for human flesh. As for Icelandic Huldufolk and Filipino Berberoka, you'll have to keep reading to discover just what makes them so chilling.
Just because they're mythological doesn't mean that faeries are any less frightening. Here are a few of their darkest attributes - just remember to shut your windows tight before going to sleep tonight.