The Merchant Marine Academy (Old Telegraph Office) of Syros
Built in the 19th century in Nisaki, it served as the first telegraph office in Greece from 1880 until 1925. It is a three-storey, oblong building of tufa and marble. If you are fans of the Navy, you should definitely visit it to see scale models of ships, pictures of sailing and historical ships as well as various exhibits related to seafaring.