Santorini

The wealthiest city of Santorini is Oia, which, together with Fira, presents undoubted splendor and wealth.

An excerpt from the article 27 facts about Santorini
The picturesque view of Oia is captivating with marble roads, beautifully decorated houses, and a whole lot of other elements of architecture and landscape. Oia owes its beauty to the captains of ships who built their stately homes and led prosperous lives.