We're all familiar with the tale of Atlantis - the ancient city that fell into the sea. Many locations around the world have been identified as a possible source of the myth - and one of the most promising is in Japan.
What you see in the picture is a rock formation just off the coast of Yonaguni Jima, and it's a minimum of 5,000 years old. Some people insist that this is a natural phenomenon - but the archway and steps don't look natural to us.