Vjetrenica (which means “wind cave” or “blowhole”) is the largest and most important cave in Bosnia and Herzegovina, and one of the most interesting caves in the Dinar mountain range, which is famous world wide for its spelaeological riches.

The cave has been explored and described to a total of about 6,1 thousand metres in length; of this the main canal is about 2,47 thousand metres long.

Vjetrenica is perhaps most interesting in a zoological sense.

In terms of its biological variety it is one of the richest caves in the world.

It is officially in second place, with 92 troglobionates, animals who have completely adapted to life in eternal darkness.