|Main source||Zagorje, Pivka
555 m (1,821 ft)
|River mouth||Flows to Postojna Cave
510 m (1,670 ft)
|Length||27 kilometres (17 mi)|
The Pivka is a karst lost river in Slovenia. The river is 27 kilometres (17 mi) in length. The Pivka ends in Planina Cave, where it merges with the Rak River and then the Unica River. The confluence of the Pivka and the Rak is one of the largest subterranean confluence in Europe. The Pivka created Postojna Cave, the longest cave system in Slovenia as well as one of its top tourism sites.
- "Reke, dolge nad 25 km, in njihova padavinska območja" [Rivers, longer than 25 km, and their catchment areas] (in Slovenian and English). Statistical Office of the Republic of Slovenia. 2002.
- Kogovšek, Janja; Petrič, Metka; Zupan Hajna, Nadja; Pipan, Tanja. "Planinska jama" [Planina Cave]. In Šmid Hribar, Mateja; Golež, Gregor; Podjed, Dan; Kladnik, Drago; Erhartič, Bojan; Pavlin, Primož; Ines, Jerele. Enciklopedija naravne in kulturne dediščine na Slovenskem [Encyclopedia of Natural and Cultural Heritage in Slovenia] (in Slovenian). Retrieved 17 May 2012.
- Media related to Pivka (river) at Wikimedia Commons
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