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Natural HeritageSpilja Vjetrenica u Ravnom

Vjetrenica Cave, Ravno

Vjetrenica is one of the world's most bio-diverse caves, famous for its powerful cool wind blowing from the entrance and its extreme concentration of rare subterranean species.

UNESCO World Heritage 2024
Where
Ravno, Ravno, Popovo Polje
Built
Prehistoric
Architect
not recorded
Materials
n/a

History

Located in Popovo Polje in the municipality of Ravno, Vjetrenica ('wind cave') is the largest cave system explored in Bosnia and Herzegovina. Its name is derived from the strong, ice-cold wind that blows out of the entrance during warm summer months, caused by differences in internal and external air pressure. The cave contains extensive limestone tunnels, spacious chambers, underground rivers, and multiple crystal lakes.

It is recognized globally as a hotspot of subterranean biodiversity, hosting more than 200 species, of which roughly 100 are troglophilic, including several endemic cave snails, crabs, and the blind salamander.

Key facts

  • ◆It is home to the famous 'Proteus anguinus' (human fish or olm), an ancient, blind, aquatic cave-dwelling amphibian.
  • ◆About 7 kilometres (7,014 metres) of passages have been explored.
  • ◆The wind blowing at the entrance can reach speeds of over 10 meters per second on hot summer days.
  • ◆First mentioned in Pliny the Elder's 'Natural History' in 77 AD as a place of eternal blowing wind.
  • ◆Incredibly biodiverse, harboring over 200 species, of which nearly 100 are troglobionts (strictly cave-dwelling animals).
  • ◆Home to the endangered Olm (Proteus anguinus), a blind cave salamander native to the Dinaric Alps.
  • ◆Skeletal remains of cave bears and a complete Ice Age leopard (Panthera pardus spelaea) have been found inside; separate claims of prehistoric drawings are thinly documented.
  • ◆Wind at the entrance regularly exceeds 10 metres per second on hot summer days, which gave the cave its name (vjetar means wind).
Why UNESCO listed it
Inscribed under criteria (x) in 2024. Criterion (vi) means association with events, traditions or ideas of universal significance; (ii) an interchange of human values; (iii) testimony to a cultural tradition; (iv) an outstanding example of a type of building; (ix) and (x) ecological processes and biodiversity.
Sources and verification

Checked 2026-09-11: designation year, dates, dimensions and attributions verified; several invented single-year construction dates in the draft were replaced with the documented century.