Kythnos with its picturesque hamlets with cobbled streets, the chapels, caves, castles and the endless coastline is a fairytale island with welcoming and open-hearted people. Is also known as “Thermia”. Its name is due to the hot springs that still exist in the bay of Loutra. The most impressive beach of Kythnos is Kolona: a line of sand splits the sea in two forming two beaches on the same seashore.