Discover the Old World in a new way on Norwegian Sky. Board an electric train in Koper and enjoy a scenic ride to the Dinaric Mountain Range where you'll explore an awe-inspiring subterranean world in the Postojna Cave. Then stroll among Santorini's famed, blue-domed roofs and enjoy wine tasting at a scenic, local vineyard. Enjoy a short ferry ride from Mykonos to the island of Delos - a UNESCO World Heritage Site and the mythological birthplace of Apollo and Artemis - and visit some of the well-preserved ancient ruins.