Essential Postojna Cave & Predjama Castle Tours 2026
✨ Step into a world of underground marvels and cliffside castles. From the epic train ride through Postojna Cave to the dramatic fortress of Predjama, discover the tours that unlock Slovenia’s most legendary landscapes.
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Did you know?
Local Insight:The “human fish” (Proteus anguinus) in Postojna Cave can live over 100 years, go a decade without food, and sense light with its skin despite being blind. This rare olm is a living fossil, perfectly adapted to its dark, watery world.
Highest Rated & Most Popular Tours
1.Top Rated – from €109 per person
Ljubljana: Postojna Cave & Predjama Castle Tickets and Tour
- ⭐ 4.8 stars from over 2,000 reviews
- All-inclusive tickets & guided tour from Ljubljana
- Ride the famous underground electric train
- See the rare blind salamander, the “human fish”
- Explore the Renaissance architecture of Predjama Castle
- Round-trip transportation in a comfortable vehicle
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2.Top Rated Combo – from €125 per person
Ljubljana: Lake Bled, Postojna Cave, and Predjama Day Tour
- ⭐ 4.8 stars from nearly 250 reviews
- Three iconic Slovenian attractions in one epic day
- Traditional Pletna boat ride to Bled Island
- Guided walking tour through Postojna Cave’s chambers
- Free time to explore the dramatic Predjama Castle
- Small group tour for a personalized experience
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Feeling the History?
Predjama Castle’s most famous resident, knight Erazem, was besieged for over a year. He used a secret vertical tunnel through the cave to smuggle in fresh cherries to taunt his enemies, cementing his legend as the “Slovenian Robin Hood”.
Luxury & Premium Experiences
3.Private Tour – from €800 per group
Maribor: Postojna Cave and Predjama Castle Day Private Tour
- ⭐ 5.0 stars for an exclusive, tailored experience
- Fully private tour with guide and vehicle just for your group
- Hotel pickup from Maribor or surrounding area
- In-depth exploration at your own pace, no rushing
- Skip-the-line access and personalized commentary
- Perfect for families or small groups seeking flexibility
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4.Premium Small Group – from €70 per person
Ljubljana: Postojna cave & Predjama castle small group tour
- ⭐ 4.8 stars for an intimate group experience
- Groups limited to just 8 people for personal attention
- Expert local guide with deep knowledge of the sites
- Includes all entrance fees and comfortable transport
- Efficient half-day tour from Ljubljana
- Focus on both geological wonders and medieval history
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A Secret for You…
The Concert Hall in Postojna Cave has near-perfect acoustics. It’s hosted actual concerts, and if you whisper at one end of the massive 3-million-cubic-meter chamber, someone can hear you clearly over 100 meters away.
Affordable & Budget-Friendly
5.Budget-Friendly – from €49 per person
Tour to Postojna Cave and Predjama Castle from Ljubljana
- ⭐ Excellent value half-day tour from Ljubljana
- Small group tour with a maximum of 8 participants
- Includes the iconic underground train ride
- One hour of free time to explore Predjama Castle
- Option to combine with an afternoon Lake Bled tour
- Direct transport from central Ljubljana
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6.Coastal Departure – from €70 per person
From Koper: 5-Hour Tour to Postojna Cave & Predjama Castle
- ⭐ 4.6 stars for a convenient coastal option
- Perfect for cruise ship passengers or visitors staying in Koper
- Efficient 5-hour tour covering both major attractions
- Guided tour of the cave and a photo stop at the castle
- See the unique “baby dragon” olms in their vivarium
- Direct return transport to Koper
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The Best Part? ✨
You’re walking in the footsteps of over 39 million visitors since 1819. From royalty to celebrities, the awe-inspiring scale and beauty of Postojna’s formations have been drawing people underground for centuries.
⭐ Our Top Pick (Likely to Sell Out!)
⭐Ultimate Combo Tour – from €119 per person
From Ljubljana: Lake Bled, Postojna Cave and Predjama Castle
- ⭐ 5.0 stars for the definitive Slovenian experience
- Three iconic destinations in one seamless 10.5-hour tour
- Small group limited to 8 for a personal, unhurried pace
- Includes Pletna boat ride to Bled Island & Bled Castle entry
- Full guided exploration of Postojna Cave’s majestic halls
- Free time to discover the secrets of Predjama Castle
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What is the best tour for Postojna Cave and Predjama Castle?
The 5-star rated Lake Bled, Postojna Cave & Predjama Castle tour is our top pick. It combines Slovenia’s top three attractions with a small group, a boat ride, and castle entry, offering unmatched value and a complete day of iconic sights.
How cold is it inside Postojna Cave?
Postojna Cave maintains a constant temperature of 10°C (50°F) year-round with high humidity. It’s wise to bring a jacket or sweater and wear comfortable walking shoes for the 1.5-hour underground tour.
Can I visit Postojna Cave and Predjama Castle from Zagreb or Trieste?
Absolutely! Excellent day trips operate from both cities. From Zagreb, combine Ljubljana with the cave & castle. From Trieste, dedicated tours offer direct transport, making these Slovenian wonders easily accessible for international visitors.
Should I book my Postojna Cave tour in advance?
Yes, securing your spot online is highly recommended, especially for small-group and combo tours. It guarantees your place, often at the best price, and saves you from waiting in long ticket lines during peak season.
Are there any discounts for students or seniors?
Many tours offer reduced rates for students, seniors, and children. The discounts are usually applied at the attraction entrances themselves. Always check the “View Details” section of your chosen tour for specific pricing and eligibility.
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Category: Europe, Slovenia
Latest post update: January 2026
