Located in the Eastern Rhodupe Mountains near the Ilinista village, the cave resembles a human vulva and dates to the Thracian period.

'The Womb') or Peshtera Utroba (Пещера Утроба, [pɛʃtɛˈra oˈtrɔbɐ], 'Womb Cave').

The cave is located 20 kilometers from the city of Kardzhali near the village of Ilinitsa and it dates to 480 BC.

[2] The "cult" places of the Thracians are usually located at the top of mountains and they have running water.

[2] In the middle of the day at a certain time of year the light which is in the shape of a phallus penetrates deep into the cave all the way to the altar.