The settlement of Old Pyli is situated strategically in an easily defendable position on the western side of the Dikaios mountain range at a height of around 300 meters above sea level. It seems to have been abandoned around 1813 or 1830. The settlement covers a very large area and within it there are a lot of paved roads, abandoned houses, a Turkish bath, and three churches. This center including the castle is one of the most important byzantine historical sites on the island of Kos. It has often been compared to Mystras: the Mystras of the Dodekanese.