Public domain
Peshchera v gorakh v 5 v. ot st. Simskoĭ
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit linePeshchera v gorakh v 5 v. ot st. Simskoĭ. 1910-01-01. Prokudin-Gorskiĭ, Sergeĭ Mikhaĭlovich. Prokudin-Gorskii Collection, Library of Congress. Public domain.