Kalbak-Tash is a unique and fascinating complex of ancient petroglyphs located in Ongudai district, at the Altai Republic of Russia. In terms of variety, chronological depth, and quality of its imagery, Kalbak-Tash offers an unusually valuable and continuous record of human expressive imagery that dates back from the Neolithic period (6000-4000 BC) to the old Turkic era (700-1000 AD).