Benefit from pick-up at the cruise ship terminal in Koper or Piran, and then make your way to Postojna Cave to explore one of the world's largest karst cave formations. Journey through the magical underworld by electric train to discover a fantastic network of passages and halls of astonishing diversity. Keep a look out for the resident olm – an exclusively cave-dwelling aquatic salamander. Continue to the idyllic village of Predjama to explore the imposing castle perched on the middle of a vertical 123-meter cliff. Get stunning views of the Lokva River as it disappears beneath the castle. Learn about the building techniques of the Middle Ages and hear the legend of the castle's most notorious owner, the baron robber Erazem of Predjama! Explore the story of the 15th-century siege and other historical facts about this extraordinary monument and testimony to the resourcefulness of the people of medieval times.