On any Lindblad Expeditions-National Geographic voyage, visits to once-in-a-lifetime destinations are a given, whether they're remote wild places or far-flung cultural treasures. But on five new itineraries aboard the National Geographic Orion, guests have a rare chance to explore some of the most storied ancient sites on the planet.

These eight UNESCO-listed World Heritage Sites—some of them thousands of years old—are the kinds of places scholars dedicate their careers to studying and travelers plan whole trips around. And for those voyaging across the Mediterranean on the elegant National Geographic Orion, visits to these prized heritage sites are merely another incredible stop on an altogether unforgettable journey.