Genghis Khan's Mongol Empire in 1227 and at its greatest extent in 1279. (Image credit: Shutterstock) Contemporary sources are largely silent on where Genghis Khan’s tomb is or what it looked like.

To keep Genghis Khan's burial site secret, everyone who attended his funeral were put to death; the executioners then died at the hands of Khan's personal escort, who in turn killed themselves.

The search for Genghis Khan’s fabled tomb poses numerous challenges. Mongolia is one of the biggest countries in the world, as well as the most sparsely populated.