Oia, Santorini, Greece.

Santorini, classically Thera and officially Thira, is an island in the southern Aegean Sea, about 200 km (120 mi) 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.

 

en.wikipedia.org/wiki/Santorini

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