Cerknica

2 45.76°, 14.36° NW
About location

Cerknica lies along the northern edge of the Cerknica Karst Field, where forested slopes enclose a broad basin shaped by water disappearing underground. Lake Cerknica is Slovenia’s best-known intermittent lake: after periods of high water it spreads across the polje, while at other times much of its bed is grassland, drained through karst swallow holes. This changing hydrology has long supported haymaking, grazing and fishing, giving the basin a working rural character rather than the fixed shoreline of a conventional lake. The phenomenon drew the attention of the Carniolan polymath Johann Weikhard von Valvasor, who described it in his 1689 work The Glory of the Duchy of Carniola. Cerknica belongs to Inner Carniola, a region of limestone plateaus, caves and enclosed karst fields.

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