Mongolia

Ulaanbaatar is Mongolia’s capital and largest city, the political, economic, and cultural hub on the Tuul River at high elevation. Founded in 1639 as a mobile monastery, it settled at its current site in 1778. Its name means “Red Hero,” and it’s famously one of the world’s coldest national capitals—facts that anchor its central role in Mongolian life. The other options are key cities but not the capital: Darkhan (industrial center), Erdenet (major copper-mining city), and Choibalsan (eastern regional hub). Memory tip: UB, the common shorthand for Ulaanbaatar—think “UB = Ultimate Base” of Mongolia’s government.