Volos is the administrative centre of the Magnesia regional unit.
The cache is placed at the end of the "Κορδόνι" as the locals use to call it. In a free translation we could name it as "The string" but actually it's a breakwater.
You can have access there through a small metallic bridge, and enjoy a long walk by the sea. The feeling when you reaching the spot of the cache is that you are in the middle of the sea. Coming back, is like approaching the harbor, and from the sea level you can have a panoramic view of the city and Pelion mountain.
To locate where the cache is, you have to reach the spot where the lighthouse is and search for small hole in the stone wall, mind a pic that I shoot recently. Please try not to be spotted from muggles (some times there are many) and compromise the spot. So act with stealth! You have to bring your own pen/pencil to be on the safe side as the pencil I left might be gone. ENJOY.