The scenic county of Nangchen (囊谦; Nángqiān), a former Tibetan kingdom, is the end of the line for most travellers. The drive from Yùshù to the dusty little county capital of Sharda (香达镇; Xiāngdá Zhèn; 3630m), colloquially referred to as Nangchen, takes you past some incredibly diverse landscapes filled with mountains, valleys, monasteries, rushing rivers and a plethora of animals and flora. You'll be tempted to stop the driver to take photos along every bend in the road.
Further south is the Qīnghǎi–Tibet border, with roads to Riwoche and Chamdo, but foreigners aren't allowed access. As you approach Nangchen, you'll pass through the 'new' town, 90% of whose buildings are unoccupied. Everything happens in the old town where the bus drops you.