Assos is one of the most beautiful locations on Kefalonia. The panorama is breathtaking with its picturesque harbour and small sandy bay where the water is so clear. The houses, with their distinctive local architecture, are almost concealed amongst the thick vegetation of pine and cypress trees. Assos, which is overlooked by Venetian fortress, has been listed as a World Heritage Site.
The Castle which was built in the 16th century by the Venetians to protect the village from pirate attacks, is in a good state of preservation. The fortifications used to cover almost the entire village, though today not much of the Castle remains. Parts of the walls and an arched entrance gate are the only preserved sections remaining and have the Venetian Lion of Saitn Mark over the gates. The Castle at one time had four entrance gates, but only two now remain. Parts of the fortifications can be seen, together with the entrance to the castle along with the ruins of the house of the Venetian Provveditore and the church of Agios Markos. The wooded hill on which the fortress stands also offers breathtaking views of Myrtos bay and the west coast of the Erisos peninsula.
A little further down the hill there is another chapel dedicated to Prophet Elias, which also contains a beautiful wooden carved iconostasis. The Castle, which was strategically placed to fend off unwanted guests, was up until 1956, used as a place for political prisoners, who lived there and cultivated the vineyards.