Your tour will begin with Postojna Cave, one of the best-known caves in the world and one of the world’s largest karst monuments. This is the only place in the world where the underground landscape can be traversed on an electric train and where you can meet this underground kingdom’s most famous inhabitant, the proteus (olm), up close.  From here the tour extends to the Predjama Castle which reigns over the surrounding area in the idyllic village of Predjama. This picturesque, magnificent, defiant, mysterious and impregnable castle has been perched in the middle of a vertical 123-meter high cliff for more than 800 years. Its romantic appeal is further emphasized by the idyllic Lokva River, which disappears into the underground world deep below the castle. As the only preserved cave castle in Europe, the Predjama Castle offers a unique insight into the building techniques and resourcefulness of people in the Middle Ages, who found a safe harbor for themselves right at the entrance of the cave. During a siege that took place in the 15th century, the castle provided a refuge for its best known and most notorious owner, Erazem of Predjama. The legend of the courageous robber baron Erazem, who remained undefeated until one of his servants betrayed him, is still in people’s minds, inspiring and alluring as ever.