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Yes, it is the right location.
And that's not a limestone, it's a granite (more precisely - beshtaunite). In 60-s it was widely used as building material for foundations of houses in Mineralnye...

http://a.imageshack.us/img409/5663/dscn0141.jpg
http://a.imageshack.us/img837/3775/dscn0003p.jpg
http://a.imageshack.us/img825/268/dscn0135h.jpg

http://a.imageshack.us/img163/1166/dscn0019.jpg
http://a.imageshack.us/img842/7771/dscn0048.jpg
http://a.imageshack.us/img682/1923/dscn0097y.jpg

It's not about cities but about a mountain. But where else should I post it? Let it be here, ok?
http://a.imageshack.us/img227/1576/dscn0001eq.jpg