The Brilliant
A five-metre white column — the cave's emblem.
Lander~slwiki — CC BY-SA 4.0 · Jakub Hałun — CC BY 4.0 · Jakub Hałun — CC BY 4.0 · Jakub Hałun — CC BY 4.0
The world's most famous show cave: Postojna is 24 kilometres of passages carved by the Pivka river through limestone, visited since 1819 — an electric train carries you 3.7 kilometres in on the world's first cave railway (1872) before a kilometre and a half on foot through halls of stalactites and stalagmites: the Great Hall, the Big Mountain, the thin "spaghetti", the "Brilliant", the famous five-metre white column, and the Concert Hall hosting orchestras with church acoustics. The cave's star is the olm, the "baby dragon": a blind pink amphibian living a century and fasting for years, seen in its cave tank and in the neighbouring Vivarium. A constant 10 degrees, so a jacket is required in summer. An hour from Ljubljana by car or bus, and paired with Predjama Castle 9 km away on a combined ticket: Slovenia's most famous day out.
A five-metre white column — the cave's emblem.
The olm in its tank.
An orchestra underground with church acoustics.
Jamska cesta 30, Postojna
Postojna is easier and more famous with its train and formations, suited to families; Škocjan is deeper and grander with its underground canyon (UNESCO) and needs walking and steps. For one visit with children Postojna; for nature lovers Škocjan.
The audio guide comes in more than 15 languages, usually including Arabic; ask at the desk.