Khan Khentii National Park. This is the motherland of Chinggis Khan, and contains numerous important historical and cultural sites. Three major river systems have their sources in the protected area; the Tuul River, which flows into Russia's Lake Baikal and continues to the Arctic Ocean, and the Onon and Kherlen rivers, which flow east to join the Amur before emptying into the Pacific Ocean. Over 1,150 species of plants, characteristic of both taiga and steppe, have been identified.

Over 50 mammal species, 253 species of birds and 34 species of fish make their home in the Khan Khentii Protected Area. Situated 80km northeast of Ulaanbaatar, Terelj is famous for its unique granite rock formations and pristine alpine scenery, and is a popular destination for tourists based in the capital and for Mongolians on weekend trips.
The park lies at an altitude of 1600m and offers activities such as hiking, river rafting, h horseback riding, skiing and rock climbing. Terelj is a landscape of transition from Siberian taiga forest to grass steppe. In spring and summer the lush meadows are carpeted with wildflowers, and the mountain pine forests and broad streams make this one of the most beautiful areas in Mongolia.