Santorini is a small, circular archipelago of volcanic islands located in the southern Aegean Sea. It lies 200 km southeast from Greece’s mainland. It is also known as Thera or Thira, forming the southernmost member of the Cyclades group of islands.
Santorini is essentially what remains of an enormous volcanic explosion, destroying the earliest settlements on what was formerly a single island, and leading to the creation of the current geological caldera.The volcano is still active, and the last eruption was in 1950, causing an earthquake that destroyed many villages on the island.