This cover from Bosnia and Herzegovina depicts 2 stamps of the same type (issue from 2008), celebrating the
Vjetrenica Cave.
Vjetrenica Cave (meaning wind cave) is the largest cave in Bosnia and Herzegovina, and the most biodiverse cave in the world. It is part of the Dinaric Alps mountain range, which is known for its karstic and speleological features. The cave is located in the Popovo field in Ravno, East Herzegovina in the Federation of Bosnia and Herzegovina, near the Adriatic Coast. Vjetrenica is the richest cave in the world in terms of subterranean biodiversity: among more than two hundred different species are registered in it, almost a hundred are troglophiles, a great number of them are narrow endemic, 15 are stenoendemic, and about 37 were discovered and described in Vjetrenica for the first time. In 2024, the
Vjetrenica Cave was designated a UNESCO World Heritage Site during the 46th session of the UNESCO World Heritage Committee.
