Postojna is a town in the traditional region of Inner Carniola, 35 kilometers (22 mi) from Trieste, in southwestern Slovenia. It is the seat of the Municipality of Postojna.
Pivka is a small town in Slovenia in the Pivka Basin in the Karst region. It is the seat of the Municipality of Pivka. It belongs to the traditional region of Inner Carniola.
The Ljubljanica, known in the Middle Ages as the Sava, 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 flows into the Sava River about 10 kilometres (6.2 mi) downstream from Ljubljana. Its largest affluent is the Mali Graben Canal. Including its source affluent the Little Ljubljanica, the river is 41 km (25 mi) in length. The Little Ljubljanica joins the Big Ljubljanica after 1,300 m (4,300 ft) and the river continues its course as the Ljubljanica.
In geography, a confluence occurs where two or more flowing bodies of water join together to form a single channel. A confluence can occur in several configurations: at the point where a tributary joins a larger river ; or where two streams meet to become the source of a river of a new name ; or where two separated channels of a river rejoin at the downstream end.
Inner Carniola is a traditional region of Slovenia, the southwestern part of the larger Carniola region. It comprises the Hrušica karst plateau up to Postojna Gate, bordering the Slovenian Littoral in the west. Its administrative and economic center of the region is Postojna, and other minor centers include Logatec, Cerknica, Pivka, and Ilirska Bistrica.
Postojna Cave is a 24,340 m long karst cave system near Postojna, southwestern Slovenia. It is the second-longest cave system in the country as well as one of its top tourism sites. The caves were created by the Pivka River.
Rak Škocjan is a valley and a landscape park, part of Inner Carniola Regional Park in southwestern Slovenia. Administratively, it belongs to the settlement of Rakov Škocjan. Rak Škocjan has been protected since 1949 and is the oldest landscape park in Slovenia.
The Rak is a stream in Inner Carniola, a traditional region of southeastern Slovenia. It sources in Zelše Caves west of the village of Zelše, flows across the Rak Škocjan karst valley for 2 kilometres (1.2 mi) and enters Weaver's Cave, where it continues for 3 kilometres (1.9 mi) and merges in Planina Cave, about 300 metres (980 ft) 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.
Planina is a village in the Municipality of Postojna in the Inner Carniola region of Slovenia. It includes the hamlets of Gornja Planina, Dolnja Planina, and Grič in the main settlement as well as Kačja Vas to the southwest and Malni and Hasberg to the south.
Lake Palčje is an intermittent lake in the Pivka basin north of the settlement Palčje in the Inner Carniola region of Slovenia. It fills an oval-shaped karst depression, crossed by Pivka, and approximately 1.5 km long and 0.5 km wide. Its bottom is relatively level at between 543 and 557 m above the sea, but the banks are steep. Lake Palčje is the largest among the Pivka Lakes with average maximum water area around 1 km2.
Hrpelje-Kozina railway station is a railway station in the Municipality of Hrpelje-Kozina, Littoral, Slovenia. The station lies on the Divaca-Koper railway. The train services are operated by SZ.
Planina Cave, formerly also Little Castle Cave after Little Castle in the vicinity of its entrance, is one of the longest Slovenian water caves. It is a huge tunnel and the subterranean bed of the Unica River. It is located in Inner Carniola. Five hundred meters from the entrance into the cave is a confluence of two underground rivers: the Pivka River, flowing from the Postojna Polje through Postojna Cave, and the Rak River, flowing to Planina Cave through Weaver Cave from Rak Škocjan. This is one of the largest confluences of subterranean rivers in Europe.
The Municipality of Postojna is a municipality in the traditional region of Inner Carniola in southwestern Slovenia. The seat of the municipality is the town of Postojna. The municipality was established in its current form on 3 October 1994, when the former larger Municipality of Postojna was subdivided into the municipalities of Pivka and Postojna.
The Municipality of Pivka is a municipality in Slovenia in the Pivka Basin in the Littoral–Inner Carniola Statistical Region. Its seat is the town of Pivka. It belongs to the traditional region of Inner Carniola.
Weaver Cave, also known as Inlet Cave, is a 2,885 metres (9,465 ft) long ponor cave in southwest Slovenia. It runs from the west (downstream) side of the Rak Škocjan Valley, where it has two entrances, and continues into Planina Cave. It is traversed by Rak Creek, part of the Ljubljanica source system. It thus forms part of the hydrological connection between Cerknica Polje and Planina Polje. Due to sumps, the stream of the Rak is very difficult to follow and was explored by divers only in 1974, when the majority of the cave was discovered in the course of a rescue expedition, and in August 2012.
The Unica is a river in Slovenia. It starts as the underground confluence of the Pivka and the Rak in the Planina Cave. This is the largest confluence of underground rivers in Europe. 300 meters (980 ft) further, the Unica emerges near Planina. It then is about 10 kilometers (6.2 mi). It flows north through the Planina Karst Field through the municipalities of Postojna, Cerknica, and Logatec, where it returns underground. It then flows for about another 10 kilometers (6.2 mi) underground, emerging 142 meters (466 ft) lower at multiple springs near Vrhnika to form the Ljubljanica River.
Betal Rock Shelter, a karst cave located on the south-eastern edge of the Lower Pivka river valley on a slope just above the road from Postojna to Bukovje is a site where rich cultural sediment layers with remains of stone tools, artifacts, and numerous fossilized bones of contemporary animals were found. Its entrance was formed by the collapse of the 174 m (571 ft) long cave's ceiling, carved out by the waters of the Pivka River.
The Pivka Basin or the Pivka Valley, also simply Pivka, is a varied basin in southwestern Slovenia, lying between high Dinaric plateaus, the Karst Plateau, and the Brkini Hills. It covers an area of 160 square kilometres (62 sq mi). To the northwest, it is bordered by Mt. Nanos, to the north, by Hrušica, to the east by the Javornik Hills and Mt. Snežnik, and to the west by the lower Slavina Plain and Tabor Hills. The lower part of the basin between Nanos and the Postojna Gate is known as the Lower Pivka Basin, and the upper part between Prestranek and Snežnik as the Upper Pivka Basin.
