For millions of years the Ponikvica stream seeped through the limestone ground of the Ponikva karst and created a magical karst cave in the Lower Savinjska Valley. With a little imagination, one can make out the figure of a devil above its entrance, and in winter steam rises from it, which is why our ancestors named it Pekel Cave (Hell Cave).
It is one of the largest tourist-developed karst caves in Styria, more than 3 million years old, and lies 4 km north of Šempeter in the Savinjska Valley. It is 1,159 metres long, laid out over two levels – the lower wet part and the upper dry part. The Peklenščica stream flows through the first, forming the highest underground waterfall in Slovenia (4 m). The upper part is adorned with dripstone formations in shades of red and brown.
The cave is home to numerous organisms, from lichens and mosses to beetles, spiders, snails, crustaceans and bats. At the exit, a beautiful landscape park with a Tourist House awaits us.
Source: https://td-sempeter.si/narava/jama-pekel/