The story about the island of Atlantis was first told 2,300 years ago by the Greek philosopher Plato, who said there was a great ancient city that was destroyed and submerged under the Atlantic Ocean.
It is unclear whether Greeks at the time took Plato’s account as a metaphor for the fall of successful societies or believed it was a record of history.
Either way, it is still a topic of hot debate for many scientists, historians and philosophers.
Here, MailOnline looks at the top five theories about – from claims it was swallowed up by the Bermuda Triangle to never existing at all.
The story about the world of Atlantis was first told 2,300 years ago by the Greek philosopher Plato who said the great ancient city had been destroyed and submerged under the Atlantic Ocean