Velebit
There are hundreds of "holes" on Velebit. It has the largest and deepest caves in Croatia. The three-part "Lukina jama" cave is 1392 m deep, making it one of the deepest caves in the world, and the deepest in southeast Europe, while the "Slovačka jama" is 1320 m. What makes it unique is that it is completely vertical, steepest in the world. At the bottom of the pothole is a water course or siphon with branches that are still unexplored. A kind of leech was discovered in the pothole, which has been ascertained to represent a new species, genus and family; it has been named "Erpobdella mestrovi".
Baredine Cave
The sightseeing lasts 40 minutes, visitors descend along a 300m long pathway up to 60m below the ground and an underground lake and visit 5 beautifully decorated chambers.
An interesting detail of this adventurous trip is also the encounter with the underground world of animals: visitors will see the cave olm (Proteus anguinus Laurenti), endemic in this dinaric karst region- an animal that can be found only in this karst area.
In one of the chambers you will pass along a 4m wide passage that leads 66m vertically down reaching the deepest point of the cave at 132m.