Must-See Wonders
Start uncovering the Green Karst through its greatest attractions, leading you into a landscape of forests, extraordinary karst phenomena, legendary castles, and unforgettable tales.
The Green Karst wonders are the essence of great stories – yet they are only the beginning of all that will amaze you here. Explore the iconic landmarks that have carried the fame of Slovenia’s karst world, set between the Alps and the Mediterranean, across the globe.
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Postojna Cave
Enter the most visited tourist karst cave in Europe and one of the world's greatest natural attractions. Take a 3.7km ride through the cave with its legendary underground train.
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Park of Military History in Pivka
The largest museum complex in Slovenia takes you into the whirlwind of recent history with its rich collection of tanks, artillery, armoured vehicles and aircraft. The exhibits testify to the period of World War II, the Cold War and the Slovenian War of Independence in 1991.
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Predjama Castle
Just a few kilometres from Postojna Cave, a 123-metre-high rock face is home to the mighty Predjama Castle – the largest cave castle in the world, also entered in the Guinness Book of Records. For more than 800 years, it has defied time and stirred the imagination of visitors.
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Križna Cave
One of the most beautiful water caves in the world is certainly Križna Cave – a unique underground world with 22 emerald lakes connected by a crystal-clear stream. Ancient cave bear bones are hidden in side passages. In terms of the number of species of cave animals, Križna Cave is even regarded as on of the the richest caves in the world.
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Lake Cerknica, the largest intermittent lake in Europe
See an unusual tiny corner of the world that's once a lake, sometimes a meadow, but always a natural wonder. Experience the changing world of Europe's largest intermittent lake, which floods and dries up throughout the year. It's different every time you visit!