土拉河
A number of Xiongnu-era royal tombs have been discovered around Ulaanbaatar, including the tombs of Belkh Gorge near Dambadarjaalin monastery and tombs of Songinokhairkhan. Located on the banks of the Tuul River, Ulaanbaatar has been well within the sphere of Turco-Mongol nomadic empires throughout history.