Journey alongside Karine Hagen, Executive Vice President at Viking, as she explores hidden treasures in some of the world’s most charming cities. Step below the streets of Naples and discover a vast labyrinth where early Greek relics and impressive Roman architecture remain amazingly intact. In Florence, go behind closed doors into a Renaissance treasure, the Vasari Corridor; and during a visit to Istanbul, get a glimpse of a 6th-century relic, the hauntingly beautiful Basilica Cistern.