...I guess, Črno jezero (Black lake).
Yes Vid, Črno, you are right.
Thank you for your attention.
I have reposted the picture with the right name stamped on, but the small preview remain the previous one.
I don't know how to solve this problem in this Site.
I have also some problems with your accented letters on this computer I use only for Internet. This limit me the writing directly in these pages!
P/S: Oh! I see now, some hours later, that also the preview is updated.