📜 Largest cave system in Slovenia, formed by the Pivka River.🔍 Features a unique underground train ride and diverse cave formations. The olm (Proteus anguinus) is a blind amphibian species endemic to deep underground caves of the Dinaric karst in southeastern Europe, and its unusual appearance is due to extensive adaptations to its habitat, living its entire life in almost complete darkness. # Why Go🚂 Experience a miniature train ride through vast caverns✨ Marvel at stunning stalactites, stalagmites, and rock formations💧 Discover unique blind amphibians like the 'human fish' (olm)👀 Observe these unique creatures in the Postojnska Jama cave complex in Slovenia🔬 See a captive colony of olm, the only place outside inaccessible underwater caves📚 Learn about their fascinating adaptations and medieval legends of 'baby dragons'👶 Witness the incredible development of olm from eggs to 8-month-old juveniles🎄 Visit during December for the traditional Living Nativity scene # Tips🧥 Bring warm clothing; temperature is consistently 10 °C (50 °F) year-round.🎟️ Book tickets in advance, especially for special events.🚶‍♂️ Tours last 1.5 hours, covering over 5 km on foot and by train.📍 Best observed in the Postojnska Jama cave complex, a well-developed tourist spot with a museum. # Cost💰 Adults 32.90 €, various package deals available. # Hours🕒 Open daily, year-round; tour times vary by season.