Santorini is one of the most southerly islands in Cyclades. It lies between Ios and Anafi, has an area of 96 sq. km and a permanent population of 11.381. It is situated 130 nautical miles from Crete and has a coastline 69 km long.
Τhe island complex of Santorini is comprised of the islands of Thera, the largest, Thirassia, the smallest and Aspronissi a small uninhabited island. These three islands are the remnants of the large prehistoric island called Strongyle due to its round shape and later, Kalliste due to its beauty, Philotera and finally Santorini. After an immense volcanic eruption around 1450 B.C. and the submersion of the central port of Strongyle , the Caldera (void) was formed, into which the sea flooded. After centuries, in its center emerged the volcano islets (Kamenes) Palea Kameni first and Nea Kameni after several centuries.