Tsagaan-Ovoo

Tsagaan-Ovoo (, White ovoo) is a sum (district) of Dornod Province in eastern Mongolia. In 2009, its population was 3,696.

Bars-Hot or Kherlen Bars () was a city built by the Khitan people in the basin of the Kherlen River in Tsagaan-Ovoo, Dornod Province, Mongolia. During the Liao dynasty it was called Hedong City (). It occupied an area of 1.6 by 1.8 kilometres and was surrounded with mud walls, which are today 4 metres thick and 1.5–2 metres high.