This beautiful cave was formed due to the karst area next to the Gorjanci hills in the Dolenjska region. It was additionally transformed by tectonic movements. Today, it is equipped with an electric lightning system and offers around 300 m of charted routes. The sinter was formed in an interesting way and some of the formations were even given names, such as: St. Nicholas, Christ, the Sabre etc. The guided tour lasts 45 minutes.