The Arkhangai Province or Arkhangai Aimag (, ; "North Khangai") is one of the 21 aimags of Mongolia. It is located slightly west of the country's center, on the northern slopes of the Khangai Mountains. It is composed of 19 soums. Geography The Arkhangai aimag is located in the interior of the country and borders to the following other aimags: Bulgan (north east), Övörkhangai (south east), Bayankhongor (south), Zavkhan (west), and Khövsgöl (north west). The highest point is Kharlagtai Peak at 3,529 m (11,578 ft), while the lowest point is the area on the confluence of the Orkhon and Tamir rivers at 1,290 m (4,232 ft). The most well-known mountain is the extinct volcano Khorgo, which is part of the Khorgo-Terkhiin Tsagaan Nuur National Park. Bodies of water The rivers Chuluut, Khanui, and Tamir have their origins in the valleys of the Khangai Mountains. Together with some smaller tributaries they all belong to the watershed of the Selenge. The Orkhon also traverses the eastern end of the aimag for a short stretch. The lake Terkhiin Tsagaan Nuur is located in the west. According to a legend it was created when a giant took a large rock and threw it away. Looking back he saw a white surface and exclaimed in surprise, "Look, a white lake!" The exclamation has become the name of the lake. The rock ended up farther to the east and is called Taikhar Chuluu. The small lake Ögii Nuur is located in the eastern part of the aimag in the Sum of the same name. History After the People’s Revolution won in 1921 throughout Mongolia reforms in administrative unit were made and the Tsetserleg Mandal Uul aimag was established on the foundation of Sain Noyon Khan aimag. Arkhangai aimag was formed from parts of the Tsetserleg Mandal Uul aimag in 1931. At that time, the aimag had 35 sums, 65,333 inhabitants in 22,285 households, and 1,800,000 head of livestock. The aimag center Tsetserleg was established at the site of the Zaya Khüree monastery, which had been first founded in 1586. Population Arkhangai covers 55,313.82 km² (21,357 sq mi), and had 89,282 citizens in Dec.31 2008, in Dec. 31 2009 89,331 who live in 19 sums and 99 bags (subdistricts) Transportation There are currently no flights to Tsetserleg's airport. The Post Bus travels daily to Tsetserleg through Kharkhorin, leaving from Dragon Center in Ulaanbaatar at 8:00am 14:00pm and