Where is it?

[Amateur]

Lithograph, image size 21.5 x 17 cm No signature. On several grounds 1950 - 1970., USSR.
Shows the so-called "natural bridge" in the valley a mountain stream, ie river washed a hole in the rock, forming a kind of bridge. A rare natural phenomenon, but it is not unique: the world of a few dozen. There is also the former Soviet Union, for example, on the river Vorotan in Armenia, on the River Kok-Suu in Kyrgyzstan, is also in Dagestan. As the outlines of "overlap" and the presence of a mountain peak in the long term as long as most suitable "bridge" on the river Kek-Suu (see attachment: it beside the bridge on the second natural ice dam, with which pictures are made, covered with stones from the talus of the second "bridge" is visible in the foreground of the second image. This jumper does not occur every year). But this place is extremely difficult to obtain (Pamir Tau), there are very difficult to get even trained mountain tourists could go there if an artist? I admit the fact that for 50 years, this "bridge" and could fall (eg, earthquake), and his pictures were not included in the Internet.

It will not help anyone to clarify, at least where is it?