Santorini caldera

Santorini caldera is a lairge, maistly submerged caldera, locatit in the soothren Aegean Sea, 120 kilometers north o Crete in Greece. Veesible abuin watter is the circular Santorini island groop, consisting o Santorini (aka Thera), the main island, Therasia an Aspronisi at the periphery, an the Kameni islands at the center.