Between 1907 and 1914, Russian photographer Sergey Ivanovich Borisov went on an expedition across the Altay Mountains on the Russian-Mongolian frontier. The images he captured would later turn up as colorized post cards, many of which appear on the linked site.
To these American eyes, the photos bear an uncanny resemblance to century-old pictures of the Western United States, like portraits of Native Americans or John Muir trekking through Yosemite.