Burial place of Genghis Khan
The location of the burial place of Genghis Khan (who died August 1227) has been the subject of much speculation and research. The site remains undiscovered, although it is generally believed that it is near the sacred mountain of Burkhan Khaldun in the Khentii Mountains.
Source: Wikipedia — Burial place of Genghis Khan (CC BY-SA 4.0)