Great pic!
Kind of hard guess, i tried to analyze a little, the houses look like the place is more on south, warmer, the roofs "say" that there is not much snow in area (or any), probably near sea. Also the background mountains look like something on Mediterranean. The whole castle look was familiar, but the polygonal tower confused me, AFAIK castles that i've seen in most of Balkans do not have that kind of tower, that eased a little my search.
After around hour of googling stuff that analysis suggested i found the exact fortress, i'm not sure if i'd ruin contest if i say the name of it. But then again i spent good time in research so i'll say it: the picture is taken east of Castle Platamon, Greece .
:)