The Unica is a river in

Slovenia Slovenia, officially the Republic of Slovenia, is a country in Central Europe. It borders Italy to the west, Austria to the north, Hungary to the northeast, Croatia to the south and southeast, and a short (46.6 km) coastline within the Adriati ...

. It starts as the underground confluence of the Pivka and the Rak in Planinska jama. This is the largest confluence of underground rivers in Europe. further, the Unica emerges near Planina. It flows north through the Planina Karst Field (''Planinsko Polje'') through the municipalities of

Postojna Postojna (; , ) is a town in the traditional region of Inner Carniola, from Trieste, in southwestern Slovenia. It is the seat of the Municipality of Postojna.

, Cerknica, and

Logatec Logatec (; , ) is a town in Slovenia. It is the seat of the Municipality of Logatec. It is located roughly in the centre of Inner Carniola, between the capital Ljubljana and Postojna. The town of Logatec has seen rapid industrial development and ...

, where it returns underground.http://www.geopedia.si/Geopedia_en.html#T1193_F5567:10114012_x442141.871_y81796.85149999999_s14_b4 Geopedia.si It then flows for about another underground, emerging lowerhttp://www.burger.si/Cerknica/PlaninskoPolje/uvod_eng.htm Planinsko polje at multiple springs near

Vrhnika Vrhnika (; ;''Leksikon občin kraljestev in dežel zastopanih v državnem zboru,'' vol. 6: ''Kranjsko''. 1906. Vienna: C. Kr. Dvorna in Državna Tiskarna, p. 120. ) is a town in Slovenia. It is the seat of the Municipality of Vrhnika. It is locat ...

to form the

Ljubljanica The Ljubljanica (), known in the Middle Ages as the ''Leybach'', is a river in the southern part of the Ljubljana Basin in Slovenia. The capital of Slovenia, Ljubljana, lies on the river. The Ljubljanica rises south of the town of Vrhnika and ...

River.

References

External links

Planinsko polje
* ttp://www.dedi.si/dediscina/89-planinska-jama dedi.si image: http://services.dedi.si/DEDIServer/res/media/image/1176/STRICT/100?1265369496 {{Commons category, Unica Rivers of Inner Carniola Subterranean rivers Municipality of Postojna Municipality of Cerknica Municipality of Logatec