Розкажіть більше
The cave was carved out over two million years by an underground river. Today the system stretches for about 24 kilometres.
An electric train takes visitors deep inside, then they walk through chambers given names like the 'Spaghetti Hall' (for thin needle-like stalactites) and the 'Concert Hall' (which has held concerts for 10,000 people).
Postojna is also home to one of the strangest animals on the planet: the olm, a pink cave salamander that can live for over a hundred years.