Legend

A legend is a story told with a narrative of truth, whether the story is actually true or not. Often times legends are based upon real life events, but as the stories are passed down verbally through the generations, they are often filled with fantastic elements, making them seem less likely to be true. But this isn't always the case.

Bottomless Cave was previously only a legend until it was discovered in modern times by Maximus Mole.

External Link

 * Legend at Wikipedia