Ignateva cave, also known as Ignatievka cave, Ignatievskaya cave (Russian: Игнатьевская пещера), or 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. It was in 1980 the site of the discovery of a wall painting of a venus figure, with twenty-eight red dots between her legs that are believed to represent the female menstrual cycle. The cave also contains microliths, remains of animals, and many other cave paintings, as well as a layer of Iron Age materials.