Hidden Siberia

In the middle of the Siberian forests of Russia, lies an ancient site forgot on purpose by the Soviets who have hide this place for so many years. Stretching for many miles. Almost everyone who lives near this place, doesn't even know it exist. What have they been hiding for so long?
The sequel to Hidden Siberia can be seen by clicking this link: https://youtu.be/uGe4DLL560Y

Видео Hidden Siberia канала The World through the Eyes of