The Tsum Valley, also known as the Hidden Valley a land of monasteries and hamlets with totally Tibetan population lies on the northern part of Manaslu on the Nepal-Tibet border and used to be a restricted area until 2008. Although the region lies within Nepal, the Buddhism influenced region is a world of its own. Traditionally, Tsum used to be a separate area different from both Nepal and Tibet. The Tsum Valley region is still less exposed in comparison to other tourist areas, with relatively virgin and less beaten paths in comparison to the more popular regions. The Tsum people have their own way of family life, which may be quite surprising for many outsiders. All the brothers in the family are married to a single girl, what you may call a practice of polyandry. Compared with other areas, The Tsum Valley and Manaslu area is full of imminent mountains, passes, deep gorges, hamlets, gompas, chortens, and mani walls.