Divers stumbled across the massive sandstone formations while hunting sharks in the Pacific.
WHEN divers went looking for hammerhead sharks in the Pacific Ocean they never expected to stumble across these incredible underwater ruins.
All manner of theories have been used to try and explain how the massive slabs got there, from them forming naturally to being man-made or even put there by aliens.
A mixture of sandstone and mudstone makes up the mysterious Yonaguni Monument, which is 490ft by 130ft and around 90ft high.
The location, sometimes described as Japan’s Atlantis, lies in the Pacific Ocean… but no one quite knows how the wreckage got there.
Since the site was uncovered in 1987, scholars have argued about how the ruins were created.