SI: Planinsko polje je šolski primer kraškega polja, saj na eni strani izvira reka, na drugi strani pa ponikne. Samo polje je dolgo 5km in široko okoli 2,5km, po njem pa v meandrih teče reka Unica. Polje leži na 450 m nadmorske višine, ter se razteza na skoraj 11 km2 površine, ter sega v tri občine – Logatec, Postojna in Cerknica. Je najnižje ležeče polje Notranjskega podolja, katero je večkrat letno tudi poplavljeno. Voda na polje prihaja iz treh različnih virov – reke Unice, Malenščice in hudourniškega rokava reke Rak - Škratovka. Na polju pa najdemo tudi endemit kraških polj, travniška modra čebulica – Scilla (lat. Scilla litardierei) saj je to njeno najbolj severozahodno rastišče. Prav tako pa na polju, kjer gnezdijo, najdemo kosca (lat. Crex crex) (ogrožena ptica), pisano penico (lat. Sylvia nisoria), rjavega srakoperja (lat. Lanius collurio ) in vodomca (lat. Alcedo atthis). Prav zaradi teh naravnih posebnosti je Planinsko polje uvrščeno v območje Natura 2000, njegove geomorfološke posebnosti pa so naravna vrednota državnega pomena.
Ob robu Planinskega polja je nastalo tudi več naselij, največje med njimi je Planina, poleg te pa še Laze, Jakovica, Grčarevec in Liplje.
Serija zakladkov po Planinskem polju vas bo popeljala na ogled znanih in manj znanih posebnosti.
Določeni zakladki vsebujejo tudi bonus številke, ki vas za zaključek peljejo na še eno skrito točko Planinskega polja.
EN: Planinsko polje or Planina field is a school example of a karst field, as the river emerge on one side and sinks on the other side. The field itself is 5 km long and 2.5 km wide, and the river Unica flows through it in meanders. Field lies 450 meters above sea level and extends over an area of 11 km2. The field spreads over three municipalities – Logatec, Postojna and Cerknica. It is the lowest lying field over the system of field in the Notranjska area. Several times in a year, the filed is flooded and transformed into a lake. The water in the filed comes from three different sources – river Unica, stream Malenščica and the torrential arm of the river Rak – Škratovka. On the field we can observe endemic flower of the karst fields - Scilla litardierei - Meadow Sea bulb. This field is its northwesternmost habitat. Beside that, on Planina field we can find the corn crake (crex crex) (which is an endangered species), barred warbler (Sylvia nisoria), Red-backed shrike (Lanius collurio) and common kingfisher (Alcedo atthis). All this natural specific, the Planina field is part of Natura 2000, the geomorfological feature of the field are part of natural value of national importance.
On the edge of the field, during time emerge also some villages and settlements. The biggest among them are Planina, other are Laze, Jakovica, Grčarevec and Liplje.
This series of the caches about Planina field will take you on the sightseeing some of the specialties.
Some caches also contain bonus numbers, which leads you to another beautiful, but somehow hidden spot of Planina field.
Foto: Valvasorjeva upodobitev Malega gradu, na levi se vidi jamo in reko Unico /Photo: Valvasor's portrayal of the Small Castle, on the left you can see the cave and Unica river.
Ravbarjev stolp in Planinska jama
SI: Planinska jama je največja vodna jama v Sloveniji, iz katere priteče reka Unica. Včasih so jo poimenovali Malograjska jama, zaradi bližnjega Malega gradu, danes poimenovan Ravbarjev stolp. Vhod v jamo se nahaja pod 65 metrov visoko prepadno steno, vhod je širok 20 m in visok 8 metrov. Le 500 metrov od vhoda v notranjost se nahaja eno največjih podzemnih sotočij v Evropi – reke Pivke in reke Rak. Jama je skupno dolga 7 km. V jami pa najdemo tudi največjo populacijo človeške ribice (lat. Proteus Anguinus) v Sloveniji. Zraven Planinske jame, na skalnem pomolu stoji zadnji ostanek Malega gradu – trinadstropen Ravbarjev stolp. Iz njega je se je lepo videlo celotno Planinsko polje. Grad je povezan tudi z zgodbo o slavnem roparskem vitezu Erazmu predjamskem, saj je Gašper Ravbar, doma iz Malega gradu bil tisti vitez, ki je uspel ubiti Erazma.
EN: Planina cave is the largest water cave in Slovenia. from which the river Unica flows. The cave used to be called Smallcastle cave (Malograjska jama), because of the nearby Smallcastle; todays Ravbarjev stolp. The entrance to the cave is located under a 65 meter high cliff wall, the entrance is 20 meters wide and 8 meters high. Only 500 meters from the entrance to the interior is one of the largest underground confluences in Europe - river Pivka and river Rak. The cave has a total length of 7 km. In the cave, we also find the largest population of human fish (lat. Proteus Anguinus) in Slovenia. Next to Planinska jama, on the rocky pier stands the last remnant of the Small Castle - the three-story Ravbar tower, from the 15th century. From the castle, there was the view over the whole field of Planina. The story of the famous robber knight Erasmus of Predjama is also connected with the castle, as Gašper Ravbar, originally from Mali grad, was the famous knight who managed to kill Erasmus.