Slovenia
Postojna Cave

The Postojna Cave (german = Adelsberger Grotte) is a 20'570 metres long karst cave near Postojna city in Slovenia. About 5,3 kilometres are open for public.

 

mountainstamp.com Slowenja 1959 Postojna Cave issued by Yugoslavia stamp

Yugoslavia 1959, Postojna Cave.

 

Slovenia/Austria 2013, joint issue, Postojna Cave.

 

 

 

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