The cache is a round purple candy box which contains "aya" :)
At the location of the cache, you need to turn your back to the road, then you will see the ancient columns at the both sides of the area. At the left, count the columns. Between 6th and 7th columns, there is a big, table shaped stone. The candy box is there on the one corner of the stone awaiting for the GeoCacher to pick him up.