Best castles around Postojna are primarily characterized by their unique integration with the natural landscape, particularly the dramatic karst topography. The region is known for its cave systems and historical fortifications built into or near these geological features. Postojna serves as a gateway to exploring these architectural and natural marvels, offering insights into medieval history and engineering. The area's landscape provides a backdrop for exploring these historical sites.
Last updated: October 5, 2026
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right under our feet the Pivka reappears after having sunk near Postojna. In the winter period the view of the intermittent Planina lake is very beautiful
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The legend tells that Polissena, Erasmus's lover, buried Erasmus near the small church in front of the Predjama Castle, planting a lindem tree which is still standing today.
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A fantastic very interesting castle. Audio guides available in many languages. I got so many impressions, it was just wonderful. As a visitor, you can go almost all the way to the top of the castle. Not cheap but definitely worth it.
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13th-century cave castle built into a rock face with restored living quarters, dungeons and secret tunnel.
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It is fascinating to see how a castle was built into a rock. Definitely an experience. Definitely worth a trip.
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The castle is very beautiful and well worth seeing. However, you should wear sturdy shoes
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The Planina Cave (Slovenian: Planinska jama), formerly also the Small Castle Cave (Malograjska jama) after the Small Castle near its entrance, is one of the longest Slovenian water caves. It is a huge tunnel and the underground bed of the Unica River. It is located in Inner Carniola. Five hundred meters from the entrance to the cave, two underground rivers meet: the Pivka River, which flows from Postojna Polje through the Postojna Cave, and the Rak River, which flows from Rak Škocjan through the Weaver's Cave to the Planina Cave. This is one of the largest confluences of underground rivers in Europe. (Source Wikipedia)
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Predjama Castle is renowned for its dramatic setting, built directly into the mouth of a giant cave, halfway up a 123-meter cliff. Recognized by Guinness World Records as the largest cave castle, its unique construction seamlessly integrates with the natural rock face. Visitors can explore its various rooms, armory, chapel, and even a torture chamber, all while learning about its fascinating history and legends, particularly that of the robber baron Erazem Lueger.
The castle is famously linked to the 15th-century robber baron Erazem Lueger, often called Slovenia's Robin Hood. During a siege, Erazem used a secret passage within the extensive cave system to smuggle in supplies, famously mocking his attackers. His dramatic demise, reportedly by a cannonball while on the toilet, adds to the castle's rich lore. You can also visit the Linden Tree of Erasmus of Predjama, planted on his grave.
Beyond the castles themselves, the region offers impressive natural wonders. Predjama Castle is built into a cave system, with a portion open to visitors seasonally. Nearby, the Planina Cave is one of Slovenia's longest water caves, where the Pivka and Rak rivers meet underground, creating a unique natural spectacle.
Yes, the area around Postojna offers family-friendly options. While exploring Predjama Castle, families can enjoy the historical narrative with audio guides and see mannequins recreating medieval life. For outdoor activities, there are several family-friendly hikes available, such as the "View of Predjama Castle – Predjama Cave loop from Predjama Castle" which is a moderate 7.2 km trail. You can find more options in the Family-friendly hikes around Postojna guide.
Predjama Castle is open year-round. However, if you wish to explore the cave system beneath the castle, it is typically open to visitors from May to September. The cave is closed in winter to protect hibernating bats. Visiting during the warmer months allows for a combined experience of the castle and its unique underground passages.
Predjama Castle is located just 9 kilometers from Postojna. During July and August, a free shuttle bus operates between Predjama Castle and Postojna Cave, making it convenient to visit both. If traveling by car, parking is available near the castle. Joint tickets for Predjama Castle and Postojna Cave are also available, making it a popular combined day trip.
Absolutely. The region around Postojna offers various hiking opportunities. Near Predjama Castle, you can find trails like the "View of Predjama Castle – Predjama Cave loop from Predjama Castle," a moderate 7.2 km hike. For more options, including family-friendly routes and varying difficulties, explore the Family-friendly hikes around Postojna guide.
Besides hiking, the Postojna area is excellent for cycling. You can find traffic-free bike rides, such as the "Goče Vineyards Scenic Road – Karst Vineyards Scenic Road loop from Slap," a difficult 59 km route. Gravel biking is also popular, with options like the "View of Lake Cerknica – Lake Cerknica loop from Rakek." Discover more routes in the Traffic-free bike rides around Postojna and Gravel biking around Postojna guides.
While specific cafes within the immediate vicinity of Predjama Castle are limited, its close proximity to Postojna Cave (just a 15-minute drive) means you can easily find dining options in the area surrounding the cave or in the nearby town of Postojna. Many visitors combine a trip to the castle with a visit to Postojna Cave, where amenities are readily available.
Visitors consistently highlight the castle's unique architecture and its integration with the cave system as truly fascinating. Many appreciate the detailed audio guides that bring the history, especially the stories of Erazem Lueger, to life. The ability to explore various parts of the castle and imagine medieval life within its walls leaves a lasting impression, with many calling it an indescribably fascinating and wonderful experience.
Yes, it is highly recommended to visit both Predjama Castle and Postojna Cave as they are very close to each other, approximately 15 minutes apart by car. Joint tickets are available, and during July and August, a free shuttle bus connects the two attractions, making it a convenient and popular combined day trip.

