Pivka_River_Postojna_Cave

The underground Pivka River flows through Postojna Cave, home of the rare endangered Olm salamander. Image credit: Iztok Medja, Postojna Cave.

The underground Pivka River flows through Postojna Cave, home of the rare endangered Olm salamander. Image credit: Iztok Medja, Postojna Cave.

Posted 
June 5, 2016
 in 

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