Which group of islands does Santorini belong to?

Santorini, officially Thira and classic Greek Thera, is an island in the southern Aegean Sea, about 200 km southeast of Greece's mainland. It is the largest island of a small, circular archipelago, which bears the same name and is the remnant of a volcanic caldera. It forms the southernmost member of the Cyclades group of islands, with an area of approximately 73 km2 and a population of 15,550.

The island was the site of one of the largest volcanic eruptions in recorded history: the Minoan eruption, which occurred about 3,600 years ago at the height of the Minoan civilization. The eruption left a large caldera surrounded by volcanic ash deposits hundreds of metres deep. It may have led indirectly to the collapse of the Minoan civilization on the island of Crete, 110 km to the south, through a gigantic tsunami. Another popular theory holds that the Thera eruption is the source of the legend of Atlantis.

Santorini's primary industry is tourism. Agriculture also forms part of its economy, and the island sustains a wine industry, based on the indigenous Assyrtiko grape variety. The expansion of tourism has resulted in the growth of the economy and population. Akrotiri is a major archaeological site, with ruins from the Minoan era, often compared to the spectacular ruins at Pompeii in Italy. It was ranked the world's top island by many magazines and travel sites, including the Travel+Leisure Magazine, the BBC and the US News. An estimated 2 million tourists visit annually.