The cave consists primarily of dark limestone rocks of the middle trias, formed in tectonic cracks by water corrosion, the demolition of some parts of the ceiling and gradually enlarged by the underground river Bystra.

The embellishment of the cave consists of stalactites and stalagmites, from which Zvonivé stalaktity (Ringing statlctites), Beldachýn (Baldaquin) and Kovacska vyhna (Blacksmith's workshop) are specially remarkable.

Except for many erosive forms a ceiling river-bed is to be seen in the cave, in which the round granit stones of the Low Tatras are attached by sinter.

[2] In the largest dome there is a memorial tablet commemorating the partisan who was shot dead by fascist soldiers directly in the cave.

Aside the sightseeing tour there is a medical hall used presently for curing the respiratory diseases of children (speleotherapy).