Best attractions and places to see in Notranjsko-kraška are largely defined by its distinctive karst landscape, featuring extensive cave systems and unique hydrological phenomena. This Slovenian region offers a diverse range of natural wonders, historical landmarks, and cultural sites. Visitors can explore subterranean worlds, ancient ruins, and remarkable disappearing lakes. The area provides opportunities to observe geological processes and rich biodiversity.
Last updated: May 11, 2026
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Hiking in Notranjsko-kraška
360° panoramic view. Food can be purchased in a hut.
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Big photogenic ruin, but unfortunately closed for access
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The ruins of the old Baroque castle rise above the Unica River gorge in the southern part of the Planina Plain. The Hošperk Castle (Haasberg) was built by the Eggenberg princes at the beginning of the 17th century, at the foot of an old medieval castle that was destroyed by an earthquake. At that time, the castle was considered the most powerful Baroque castle in Slovenia. It was famous for its rich interior and beautiful park, which unfortunately is only partially preserved today. The last owner of the castle was the Windischgrätz family, who purchased it in 1846. During the Second World War, the nobles emigrated to Italy and the castle was occupied first by the Italian army, then by the German army, and in 1944 it was burned down. The valuable interior furnishings, the family archive and the family tomb of the last owners of the Windischgrätz Castle were completely destroyed.
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The ruins of the old Baroque castle rise above the Unica River gorge in the southern part of the Planina Plain. The Hošperk Castle (Haasberg) was built by the Eggenberg princes at the beginning of the 17th century, at the foot of an old medieval castle that was destroyed by an earthquake. At that time, the castle was considered the most powerful Baroque castle in Slovenia. It was famous for its rich interior and beautiful park, which unfortunately is only partially preserved today. The last owner of the castle was the Windischgrätz family, who purchased it in 1846. During the Second World War, the nobles emigrated to Italy and the castle was occupied first by the Italian army, then by the German army, and in 1944 it was burned down. The valuable interior furnishings, the family archive and the family tomb of the last owners of the Windischgrätz Castle were completely destroyed.
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The ruins of Haasberg Castle, once considered one of the most beautiful Baroque castles in Slovenia and, with its valuable inventory, also one of the richest, stand near Planina pri Rakeku above the gorge of the Unica River.
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This gorge is super beautiful and very impressive.
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Beautiful little cave that invites you to go in. Be careful, there's a drop at the end.
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Notranjsko-kraška is renowned for its unique karst landscape. You can explore extensive cave systems like Postojna Cave, Zelške Caves, Križna Cave, and Planina Cave. The region also features the remarkable intermittent Lake Cerknica, which dramatically changes size with the seasons, and the picturesque Rakov Škocjan Karst Reserve with its natural bridges.
Yes, the region boasts several historical landmarks. The most popular is Predjama Castle, a 13th-century cave castle built into a rock face, featuring restored living quarters and a secret tunnel. You can also visit the ruins of Haasberg Castle (Hošperk Castle), a once-magnificent Baroque castle, and Snežnik Castle, which has been converted into a museum.
The diverse landscape of Notranjsko-kraška is perfect for various outdoor activities. You can enjoy hiking, cycling, and birdwatching, especially around Lake Cerknica and within the Notranjska Regional Park. There are also specific guides for easy hikes, gravel biking, and mountain hikes, offering routes for all skill levels.
Absolutely. Postojna Cave is a great family attraction, offering an underground train ride and a Vivarium with the unique proteus. The paths within the cave are well-developed, and even those with limited mobility can enjoy parts of the experience. Exploring the Rakov Škocjan Karst Reserve with its natural bridges also offers an engaging outdoor adventure for families.
For breathtaking panoramic views, consider climbing Slivnica Mountain, which offers vistas of the Notranjska land, including Lake Cerknica, distant hills, and even the Alps on clear days. The Veliki Snežnik summit on the Snežnik plateau also provides expansive views, as does the Saint Trinity Church (Sveta Trojica) Summit.
Lake Cerknica is one of Europe's largest intermittent lakes, meaning its size fluctuates dramatically. After heavy rains, it can become a vast lake, while during dry periods, it shrinks significantly, revealing a plain. This dynamic ecosystem is a prime location for hiking, cycling, swimming, and birdwatching, and its disappearing waters were famously studied in the 17th century.
Yes, the region is famous for its water caves. Križna Cave is a spectacular water cave known for its underground lakes and cave bear bones, offering a unique exploration experience with lanterns and boats. Planina Cave is Slovenia's largest water cave, where the Pivka and Rak rivers converge underground before emerging as the Unica River. The Zelške Caves within the Rakov Škocjan Karst Reserve are also water caves where the Rak River originates.
The Notranjska Museum Postojna is a key cultural site, preserving the region's heritage and featuring the Karst Museum, an interactive exhibition on the karst landscape. The Cultural Center Cerknica serves as a hub for cultural life in Notranjska Park, hosting various events, concerts, and educational programs.
The Rakov Škocjan Karst Reserve is a picturesque canyon formed by a collapsed cave ceiling. It's famous for its impressive natural bridges, which rise up to 40 meters above the Rak River, and its passage caves. Declared Slovenia's first landscape park in 1949, it's an excellent place for walking amidst ancient trees and observing unique geological formations.
Spring and autumn are generally ideal for outdoor activities in Notranjsko-kraška, offering pleasant temperatures for hiking and cycling. Spring brings lush greenery and active wildlife, while autumn showcases vibrant foliage. Summer is also popular, especially for water-related activities around Lake Cerknica, though some areas might be drier. Winter offers opportunities for snow activities, particularly in areas like Bloke, known as the birthplace of Slovenian skiing.
Yes, Notranjsko-kraška offers several easy hiking options. You can find trails around Lake Cerknica and within the Notranjska Regional Park that are suitable for leisurely walks. For specific routes, check the Easy hikes in Notranjsko-kraška guide, which includes routes like the 'Waterfalls on the Iška' loop or the 'Notranjska Regional Park Parking Lot – Lake Cerknica' loop.
Visitors frequently praise the unique natural beauty and the sense of wonder found in the region's attractions. The underground train and stunning formations of Postojna Cave are highly recommended, as is the fascinating experience of Predjama Castle built into a rock face. The mystical atmosphere of the Rakov Škocjan Karst Reserve and the dynamic landscape of Lake Cerknica also leave lasting impressions.
The Bloke area holds historical significance as the cradle of Slovenian skiing tradition. It's also home to Glamping Lake Bloke, a unique glamping site featuring wooden sculptures and a cozy atmosphere, offering a different kind of accommodation experience.
For Postojna Cave, it's highly recommended to book tickets in a bundle with Predjama Castle, as they are only about 7 km apart. The cave tour involves an underground train and about 1.5 km of walking on well-developed paths, with some inclines. Audio guides are available at both sites, providing rich historical and geological information. Dress warmly for the cave, as temperatures are consistently cool.
Beyond the major attractions, the Iška Gorge offers a beautiful small cave and sawmill ruins, providing a glimpse into the region's natural and industrial past. The Lož Valley is also recognized for its scenic beauty and connection to the region's unique hydrology, offering a more tranquil experience of the Karstic waters.


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