according to greenpeace, ubsunur hollow counts 40,000 archaeological sites from nomadic scythians, turks, huns and other tribes. a number of its archaeological artefacts remain unstudied. in central asia, it has the highest concentration of burial mounds, constituting around half of its archaeological sites, and many of which are older than the egyptian pyramids. thousands of rock carvings and stone sculptures remain from medieval settlements and buddhist temples.