Welcome to the most captivating cave in the world and the largest show cave in Europe! While touring the 24-kilometre-long cave system, you will get to feel the magic of the underground world and experience a one-of-a-kind ride on Postojna Cave's underground train. From the magical depths of Postojna Cave make your way to the fairytale world of knights. The Predjama Castle is another must-see Postojna Cave Park attraction – a veritable medieval miracle, perched in the middle of a rocky cliff for 800 years. Its unique location makes it one of ten most fascinating castles in the world.