Postojna

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Introducing Postojna

The karst cave at Postojna, one of the largest in the world, is among Slovenia’s most popular attractions. As a result, it is very commercialised and jammed most of the year with tour groups. It must be said, however, that Postojna’s stalagmite and stalactite formations are unequalled.

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The Postojna Cave (Postojnska Jama) system, a series of caverns, halls and passages some 20.5km long and two million years old, was hollowed out by the Pivka River, which enters a subterranean tunnel near the cave’s entrance. The river continues its deep passage underground, carving out several series of caves, and emerges again as the Unica River. The Unica meanders through a sunken field of porous limestone – the Planinsko Polje (Planina Polje) – which becomes Lake Planina in the rainy season. But, as is the nature of what is called a ponor river, it is soon lost to the underground. It reappears near Vrhnika as the Ljubljanica River and continues its journey northward to the capital.

Last updated: Feb 17, 2009

Thorn Tree forum discussion

Recent posts

  1. pompom avatar
    Re: Sunday sightseeing

    by pompom 07 September 2011

    Thankyou. Transport won't be a problem because we can book the ship's own. Yes, it's probably expensive compared to paying locally but…
  2. mazingrace avatar
    RE: Crossig from Gorizia to Nova Gorica

    by mazingrace 31 July 2011

    On this route you would probably be better off taking buses -- use http://ap-ljubljana.si/eng/ putting in Mestre as departure and Postojna…
  3. mr_sneaky avatar
    RE: Relaxing beach - Slovenia or Italy

    by mr_sneaky 28 July 2011

    In Slovenia there is not a wide selection of beaches - there is a sandy one in the town of Portoroz and a rocky one in Piran. Piran is…

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