Kythnos is a cycladic island, between Kea and Serifos (West Cyclades), 52 nautical miles from the port of Pireus and only 2 hous from the port of Lavrio.

It has been called “Thermia” since the 12th century. The name “Thermia” is due to the hot springs of water existing to this day at the bay Loutra. Kythnos is 99.3 square kilometers, with 104 km of coastline, 92 bays, coves and beaches, most of which are accessible by car.

There are two inland villages, Chora or Messaria numbering 806 inhabitants, and Dryopida numbering 797 inhabitants (census of 2001). Additionally, there are three main coastal settlements: the main port Merichas, numbering approximately 250 inhabitants, Loutra with the hot water springs and Panagia Kanala with the church of the same name. There are daily connections between Kythnos and the ports of Pireus and Lavrio.