Oia is a coastal town on the northwestern tip of Santorini, a Greek Aegean island. The town has whitewashed houses carved into the rugged clifftops, and overlooks a vast caldera filled with water. In a 19th-century mansion, the Naval Maritime Museum has exhibits on local seafaring history, including old figureheads, sailors’ chests and models of old ships. Nearby is the ruined Oia Castle, known for its sunset views.

Santorini is one of the Cyclades islands in the Aegean Sea. It was devastated by a volcanic eruption in the 16th century BC, forever shaping its rugged landscape. The whitewashed, cubiform houses of its 2 principal towns, Fira and Oia, cling to cliffs above an underwater caldera (crater). They overlook the sea, small islands to the west and beaches made up of black, red and white lava pebbles.