This island is a must see for everyone who visits Crete. It is now possible to travel by speed boat and be on the island in less than 2 hours.
Santorini is essentially what remains after an enormous volcanic eruption that destroyed the earliest settlements on a formerly single island, and created the current geological caldera. A giant central, rectangular lagoon, which measures about 12 by 7 km (7.5 by 4.3 mi), is surrounded by 300m (980ft) high, steep cliffs on three sides. The main island slopes downward to the Aegean Sea.