Guryevskie quarries, or Byakovskie quarries— They are three separate systems of underground passages on the bank of the river Osetr. Approximately in the XV-XVI centuries limestone was mined by bottomhole method. Limestone was of poor quality, and so a century later extraction was stopped.
The total length of all cave passages ranges from 90 to 120 km. At the entrance to the caves there is a log, where every descending person is to check-in, and when they leave they have to check-out. There are many camping sites on the territory where you can spend the night. It is not recommended to go down the caves