The Museum of Lost Things: True Tales of Fabled Treasures, Legendary Cities, and Mythical Creatures That Vanished From History (National Geographic Partners, LLC, 2026) explores the many treasures and stories lost to time, and one of the most intriguing is the tomb of Genghis Khan, the most successful ruler in history. Despite centuries of speculation and searches, his burial site remains hidden, and many believe it was deliberately concealed to preserve his legacy and prevent the spread of his supposed curse. Born in Mongolia around 1162, Genghis Khan — originally named Temüjin — faced a difficult childhood. His father was poisoned by a rival tribe, and his family was banished to the harsh steppes. Yet, against all odds, he rose to power, uniting the Mongol tribes and becoming the "universal ruler" in 1206. His military strategies were both swift and brutal, and his empire stretched from Korea to the Caspian Sea. Despite his ruthless conquests, Genghis Khan introduced policies that improved life for the conquered, including religious tolerance and diplomatic immunity. When Genghis Khan died in 1227, the details of his death remain unclear, and the circumstances of his burial are shrouded in mystery. His wife, Yesui, dressed his body in white and wrapped it in fragrant sandalwood. According to legend, a thousand soldiers carried his body to a mountain, where they reportedly killed everyone in their path to ensure the location remained secret. The grave was then concealed by diverting a river and trampling the ground with horses. The soldiers themselves were later killed to ensure no one could reveal the location. Today, the search for Genghis Khan's tomb continues, with four countries — Mongolia, China, Kazakhstan, and Russia — each claiming his remains lie within their borders. The strongest claim points to Burkhan Khaldun in northeast Mongolia, a site believed to be Genghis Khan's favored resting place. However, the area remains difficult to access, with extreme weather and harsh terrain making exploration challenging. Despite numerous searches, no definitive evidence of his tomb has been found, and the mystery of Genghis Khan's burial remains unsolved.