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Cache is located at the beautiful Didymoteixo village at the byzantine castle. It is stuck inside a hole of a big rock.
In the cache is a pen, a logbook (sort of) and some other little things. You are welcome to take smthg and leave smthg.
Inside the cache you will also find among other things the photo of the XVI Mechanized Infantry Division at Didymoteixo where I spent 6 useless and painful months. Well, maybe it was not so bad after all. Anyway, why should you care? ;-)
I should also mention that you should carry a photo camera to take some shots, since the view from the castle is very very nice.
(No hints available.)