The Hidden Grave

Genghis Khan died in 1227, and where he lies is still one of history's great mysteries. By legend, his funeral escort killed anyone who saw them pass, so no outsider could ever point to the spot.

• Horses were stampeded over the grave to flatten and hide it
• Some stories claim a river was diverted to flow across the site
• The soldiers who buried him were said to be killed — and their killers killed in turn
• Despite satellites and modern archaeology, the tomb has never been found

A man who redrew the world's map and, by genetic estimates, left roughly 16 million male descendants alive today simply vanished into the earth. It may be his most complete disappearance of all.