Oia (Ia), Santorini, Greece The picturesque village of Oia (Ia), located on a steep cliff in northwestern Santorini, is famous for its unique view of the Santorini volcano, Caldera and Aegean Sea, as well as its whitewashed houses and narrow streets. Santorini Island is a one-of-a-kind vacation destination that offers visitors impressive landscape and sea views, wonderful beaches and significant archaeological sites, making it the perfect holiday spot for all kinds of tourists. It’s no wonder that Santorini is considered by many to be the most romantic and spellbinding place in the world.