Baku, May 10, AZERTAC All of the Greek islands are undeniably beautiful, but head to the hillside town of Oia for some of the best views of the bright blue Aegean Sea.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. Worth visiting is a 19th-century mansion - the Naval Maritime Museum, which 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.