Venture deep beneath the Slovenian karst landscape to discover a world of stunning geological wonders, unique creatures, and a one-of-a-kind train ride. Postojna Cave isn't just a cave; it's an underground spectacle.
Ride the World’s First Cave Railway
Forget a long, arduous trek into the
darkness. Your adventure at Postojna Cave begins aboard the world’s only double-track cave railway. For over 140 years, this train has been whisking visitors into the heart of the mountain. The 3.7-kilometre journey is an attraction in itself, taking you through immense decorated halls and tunnels before you even set foot on the walking path. Originally consisting of carriages pushed by guides in 1872, the system was later upgraded to use gas and then electric locomotives. It offers a thrilling and accessible way to experience the cave's vastness, making a huge portion of this 24-kilometre-long system available to everyone, including families and those with mobility impairments.
Meet the Legendary 'Baby Dragons'
Postojna Cave is home to a creature of myth and legend: the olm, or 'human fish'. This blind aquatic salamander, with its pale, fleshy skin and red feathery gills, was once mistaken by locals for a baby dragon. It is the largest cave-dwelling animal in the world, perfectly adapted to a life of complete darkness. The olm can live for over 100 years and survive without food for more than eight years. Visitors can see these remarkable creatures in a specially designed aquarium area, offering a rare glimpse into the unique biodiversity of the underground world. The cave is considered a cradle of speleobiology, housing over 150 animal species in total.
Explore Halls of Impossible Beauty
Carved by the Pivka River over millions of years, the cave is a natural art gallery of jaw-dropping scale. The 1.5-hour tour takes you on a walking path through a series of breathtaking chambers. You'll wander through halls named for their distinct features, like the Spaghetti Hall with its thin, delicate stalactites, and the White and Red Halls, named for the colour of their calcium deposits. The sheer variety of stalactites, stalagmites, and curtain-like formations is astounding. The cave's most famous formation is the 'Brilliant', a five-metre-tall, gleaming white stalagmite that has become a symbol of Postojna. These formations grow incredibly slowly, taking centuries to grow just a single centimetre.
Attend a Concert in an Underground Cathedral
One of the most surreal experiences Postojna offers is the chance to hear music in its Concert Hall. This massive chamber, known for its exceptional acoustics, has space for up to 10,000 people. Over the years, it has hosted performances by symphony orchestras, choirs, and soloists, creating an unforgettable atmosphere deep within the earth. The cave also hosts a famous annual 'Living Nativity' scene during Christmas, with over 500 performers staging biblical scenes along the visitor route, transforming the subterranean landscape into a magical festive world.
Discover a Castle Built into a Cliff
Just a few kilometres from the cave lies a structure straight out of a fantasy novel: Predjama Castle. As the world's largest cave castle, it has been perched dramatically in the mouth of a cave on a 123st metrend high cliff for over 800 years. The castle is famous for its legendary 15th century owner, the rebellious knight Erazem of Predjama, often called the 'Slovenian Robin Hood'. He famously used the secret cave tunnels behind the castle to withstand a year long siege, smuggling in supplies and taunting his enemies. Visiting the castle and cave together offers a unique journey through both natural wonder and medieval history.
