Ordinskaya Cave is located on the left bank of the Kungur river, the Perm Region. It’s the longest underwater cave in Russia and the second longest underwater cave in Eurasia. Here you can read more about Russian caves.
The cave consists of a "dry" and an underwater part. The length of its underwater passages is more than 4,600 m while its dry part is 300 m long.
Ordinskaya Cave is gypsum, it is characterized by a low water temperature (it rarely rises above 7 degrees Celsius), numerous underground galleries, high water transparency and low turbidness.