When leaving Embonas to the south you will find a small rural road going to the left after roughly 200m. Then, follow this road upward (as indicated with red marks and stone piles, which you can follow until the top) into the vineyards. At some point you will come to the end of the vineyards with a fence, there will be a small staircase to climb over. Then follow the middle valley, full of instable rocks and stones. This is the most challenging part, be careful! Finally, you will reach a few trees near the top where walking gets easier again. Go to the right from the tree and walk to the top, where you will find the forgotten and abandoned temple ruins of Zeus.