Atlantis isn't the only legendary sunken island. Mu is a legendary continent also said to have vanished under the waves. Now Masaaki Kimura, a marine biologist in Japan, found underwater rock formations off the coast of Japan that he believes to be proof of a civilization that could be, or at least inspired, the continent of Mu.

The rock formations he investigated near Yonaguni Island were found to be unnaturally smooth, some even forming staircases. Kimura believes that, judging from the rubble, the formations are the remains of an ancient city that resembled that of the Romans.

He believes that the city contained a castle, a shrine, a triumphal arch, statues and even a Colosseum. All of these marvels sunk along with the city in an earthquake over 3,000 years ago. Many argue the theory saying that the formations could have been the result of tidal and volcanic activity. Also, no evidence of human activity such as weaponry or pottery have ever been found.

Watch the video of the underwater "city" and judge for yourself whether it could be possible that the lost continent has indeed been found. It's an interesting watch at the least (forgive us for the ad, but it comes with the embed, apparently):