The Rak is a streaminInner Carniola, a traditional region of southeastern Slovenia. It sources in Zelše Caves (Zelške jame) west of the village of Zelše,[1] flows across the Rak Škocjankarst valley for 2 kilometres (1.2 mi) and enters Weaver's Cave (Slovene: Tkalca jama),[2] where it continues for 3 kilometres (1.9 mi) and merges in Planina Cave (Planinska jama), about 300 metres (980 ft) from its entrance, with the Pivka River to form the Unica.[3] The confluence of the Rak and the Pivka is one of the largest subterranean confluences in Europe.[4]
^Javornik, Marjan; Voglar, Dušan; Dermastia, Alenka, eds. (1996). "Zelše". Enciklopedija Slovenije [Encyclopedia of Slovenia] (in Slovenian). p. 153. ISBN9788611153667.
^"Mali in Veliki naravni most" [The Big and the Little Natural Bridge]. Www.tdrakek.si (in Slovenian). TD Rakek. Retrieved 17 May 2012.
^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 (eds.). Enciklopedija naravne in kulturne dediščine na Slovenskem [Encyclopedia of Natural and Cultural Heritage in Slovenia] (in Slovenian). Retrieved 17 May 2012.
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