The beautiful views of Lake Cerknica and valleys of the Notranjska region made witches and their mistress Uršula,  choose Mount Slivnica as their home. Their wrongdoings were first described by Johann Weikhard von Valvasor. The witches supposedly brewed their potions, rain and storms in the Coprniška Jama cave beneath the peak. Today, this bald-peaked hill is a popular destination for hikers, who can access the mountain just  beneath the peak from each of the villages at the base, and enjoy arguably the best view of the Lake Cerknica. If you can’t resist the magical sunset and  nightfall, don't be afraid, the witches have long ago retreated to less-crowded places. But you might bump into a bear!

The highest peak, Velika Slivnica (Big Mount Slivnica), is 1,114 meters high and rises on the northern side above Lake Cerknica. Mt Slivnica's round ridge is separated from the Bloke plateau by the valley of the Cerkniščica stream and the  ravines of its tributaries. Along its base, there are some smaller karst springs, which help to fill the lake, and a few villages that grew along the main road to the Lož valley and Bloke.