Rak (stream)

The Rak is a stream in Inner Carniola, a traditional region of southeastern Slovenia. It sources in Zelše Caves (Zelške jame) west of the village of Zelše, flows across the Rak Škocjan karst valley for 2 km and enters Weaver's Cave (Tkalca jama), where it continues for 3 km and merges in Planina Cave (Planinska jama), about 300 m from its entrance, with the Pivka River to form the Unica. The confluence of the Rak and the Pivka is one of the largest subterranean confluences in Europe.