The cache is located at the Rentina Castle. Ιt contains logbook, pen, and it is big enough to host many things. Castle is always closed, so you have to jump over the door or wall!
Rentina Castle is a ruined castle built in the 6th century AD in the place of a roman fortress on a steep hill overlooking ancient "via Egnatia". In the 10th century it became the centre of a diocese.