Known for being one of the largest intermittent lakes in Europe, Lake Cerknica appears annually on a fantastic karst plain, located between the Javorniki Hills, the Bloke Plateau and Mt. Slivnica. The lake remains on the Cerknica Plain for approx. 8 months and its waters can spill over a 30 km2 surface, creating the largest lake in Slovenia. The lake’s hydrology was first researched by Carniolan natural historian Johann Weikhard von Valvasor, which won him a Fellowship at the Royal Society in London which won him a Fellowship of the Royal Society. Along with the Rakov Škocjan Valley and the Križna jama Cave, Lake Cerknica has been designated as a Ramsar Site and a Natura 2000 Site due to its importance in preserving endangered birds. The area in and around the lake boasts an incredible biodiversity, with 276 bird species, 45 mammal species, 125 butterfly species, and 15 amphibian species living there. The abundance of fish doesn’t only make it a popular fishing destination nowadays, but has been attracting people since the Stone Age.