Deep in the Himalaya of Tibet exists an area shrouded in myth and mystery. National Geographic follows a remarkable journey to one of the last undiscovered places of the 20th century in the Tsangpo Gorges. It takes tenacious explorers to dare this trek. The Tsangpo Gorges are widely regarded as the deepest on earth -- in places three times deeper than the Grand Canyon. Explorers Ian Baker and Ken Storm are in search of a legend. Stories passed on from an old Tibetan lama speak of a paradise in the wilderness, and of a great waterfall. Starting in Lhasa, Tibet's capital, it takes the team three full days to cover 300 miles by truck. Roads are buried in mud or cut off by landslides. Once they reach the Pemako region where the Tsangpo Gorges are located, their journey will take them another seventeen days on foot, guided by local hunters through forbidding territory filled with tangled vegetation, old bridges, and sheer cliffs. Earlier adventurers have been turned back by the dangerous landscape and harrowing conditions. Join National Geographic's team of modern-day adventurers on an unforgettable expedition into a hidden paradise.