Ignatievka Cave (Ignateva cave, Ignatievskaya cave, , also known as Yamazy-Tash) is a large limestone cave on the banks of the Sim River, a tributary of the Belaya river in the southern Ural Mountains of Russia. In 1980 a parietal wall painting of a venus figure was discovered. The twenty-eight red dots between her legs are believed to represent the female menstrual cycle.