The lost tomb of Genghis Khan, Mongolia's best-kept secret and only remaining tie to its spiritual and political forefather, could be unearthed and destroyed by looters at any time. Can engineer and explorer Albert Lin, equipped with cutting-edge technology and just a handful of obscure clues from ancient texts, find and protect the tomb of the Great Khan before it is possibly destroyed? National Geographic joins Lin on a seemingly impossible quest: to locate the tomb of Genghis Khan without being allowed to dig, somewhere in a territory that measures thousands of square miles in area. Lin's research leads him to search for a lost mountain-the Burkhan Khaldun-in the heart of the "forbidden zone." But to get there he must first conquer a series of natural obstacles, including an inhospitable landscape, swollen rivers, and violent storms. It is on the Burkhan Khaldun that Lin makes his most remarkable discovery, one that may solve an 800-year old mystery and cause waves in the archaeological community for decades to come.

The Western world has said goodbye to societies who use sea shells as currency and sacrifice animal hearts in religious rituals, but award-winning reporter Donal MacIntyre is determined to seek out these forgotten communities in The Edge of Existence.
Throughout the World there are places so inhospitable that humans cannot survive there long term. This series is about what it’s like to live at the very edge of existence - where every day is a struggle and mistakes are punished by death. Donal MacIntyre has proved his bravery. He has proved his mental and physical strength. He has proved his athleticism. But can he prove himself to people who take extreme hardship for granted.