For those who want to explore beyond these single tourist areas, several new itineraries have been added in recent years' Lhasa-Ngari-Xigaze; and a route tracing the path Princess Wencheng followed on her way to Tibet. Specialty tours include exploration by automobile, trekking and scientific investigatory tours. Other special events include the Shoton (Sour Milk Drinking) Festival in Lhasa, the Changtang Horse Race Festival in the North Tibet Plateau and the Yarlung Culture and Arts Festival in Shannan.