Cave explorers from Speleological section Velebit with a few other Croatian clubs discovered in 2004.

A pit inside a mountain Velebit in central Croatia believed to have the world's deepest subterranean free-fall vertical drop, at nearly 513 m. At the foot of the Velebita cave are small ponds and streams, including one of the largest known colonies of subterranean leeches. It is located in the Rozanski kukovi area of the National park North Velebit in the rocky Velebit mountain range in central Croatia.

The videos

Velebita 2007 - part 01

Velebita 2007 - part 02

Velebita 2007 - part 03