Every evening the world lines up here: Oia, the cliff village that became Santorini's synonym — white cave houses terracing the caldera, the three famous blue domes, windmills waiting for the Aegean-drowning sun. Castle sunset peaks the crush — the wise book a restaurant terrace or watch from the upper Fira-Oia path; before 9am the lanes and domes stand empty for true photography; the 300-step Ammoudi stair descends to the little fish harbor — a waterside lunch worth the climb back.