Najdena lies about 300m north of Vranja Jama and consists of a complex of phreatic tubes, perched above the water table, extending for several Kilometres beneath the forest to the north of Laze. It doesn't boast any of the formations or lakes found in other Slovene caves, but never the less is very interesting in its own right.

During the extremely dry weather of 1993, an exploratory trip was made to the Sumeca Dvorana in the north-eastern extremities of the system. It had been reported that the passages beyond the 'final' sump had only been passed by divers on a couple of occasions and were not fully explored. Even in this period of low water, there was still no airspace so a visit was made to the southern part of the cave, a series of canyon-like passages lying beneath Vranja Jama.

On the way out of Sumeca, a series of high-level fossil passages was pushed to several inlets requiring the use of climbing aids. Fred also squeezed his way into the 'Labirint' and explored a series of normally submerged passages.In Konglomeratna Dvorana a draught was noticed, along with a fair amount of water percolating through the roof. This is an unusual feature in Najdena and suggests a close proximity to the surface, possibly providing an alternative entrance.The original entrance appears to be Jama Na Meji, an 85m deep shaft to the east of Vranja Jama, which may possibly provide access to the river system beneath Najdena which drains the Planinsko Polje.