[3]: 38 The name "Javornica" derives was given to it in commemoration of the Planinarsko društvo "Javor" mountaineering society, from which most of its first explorers had come, although by that time they were members of the PDS "Velebit".

[1]: 11 The entrance pit leads into a roughly 10×20 m chamber up to 5 m high with a sloped floor covered in stone blocks that have fallen from the roof over geological time, in which fossils can be found.

The roof of Puzavac is decorated with numerous stalactites, covered in a thin layer of clay and remains of leaves and branches deposited at high water.

[1]: 12 The northwest continuation in the direction of the polje of Križevščak leads to a somewhat smaller chamber with an uneven, angled floor.

This chamber has fewer speleothems, but several cracks at the end transmit black earth from the surface at high water level, and at the floor are two springs.

The total distance traversed by the stream along the main canals is 250 m.[1]: 12 These two springs are known from a flow tracing experiment to derive from the surface ponors of the Križevščak polje.

But the entrance was only about 10 cm wide and required widening with dynamite, carried out by Weingärtner, director of the Firefighter's School in Zagreb.