Santonini was probably the most scenic place I have ever visited. Then again, some of the other stops on the cruise were close as well. When you see postcards of the Greek Islands, this island is probably what you're seeing. From the cruise description:
Santorini, the legendary island of all Greek islands. Sailing into the Caldera is like floating inside of a giant open-air geological museum. With towering cliffs stretching before you and a stark mystic of this once circular island, it is the postcard perfect island of Greece.
The island was born of a volcano during prehistoric times. The inlet where we anchored was the caldera of the volcano. Many believe this island is all that remains of the lost continent of Atlantis