Essential Postojna Cave Tours for 2026
✨ Journey into a 2-million-year-old underground kingdom. From epic train rides through glittering caverns to castles built into cliffs, discover the tours that unlock Slovenia’s most magical wonders.
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Did you know?
Local Insight:Postojna Cave is home to the ‘baby dragon’ or olm, a blind salamander that can live up to 100 years. This rare creature, found only in the caves of the Dinaric Alps, was once believed to be a dragon offspring by locals, adding a layer of myth to this already mystical underground world.
Highest Rated & Most Popular Tours
1.Top Rated Combo – from €69 per person
Ljubljana: Postojna Cave and Predjama Castle Tour
- ⭐ 4.9 stars from over 235 reviews
- Visit two iconic Slovenian sites in one efficient half-day
- Small-group tour with max 8 people for a personal experience
- Includes round-trip transport from Ljubljana hotels
- See the cave by electric train & explore the cliff-face castle
- English-speaking driver-guide provides engaging commentary
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2.Coastal Departure – from €113 per person
From Trieste: Postojna Cave & Predjama Castle
- ⭐ 4.8 stars from over 437 reviews
- Perfect day trip for visitors staying in Trieste, Italy
- Comprehensive 6-hour tour with all logistics handled
- Meet the famous proteus (olm) in its cave habitat
- Explore the only preserved cave castle in Europe
- Learn the legend of the robber baron Erazem
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A Secret Passage?
The electric train inside Postojna Cave has been operating since 1872, making it the first underground cave railway in the world. It whisks you 3.7 km into the mountain before you continue on foot, following in the footsteps of over 38 million visitors.
Luxury & Premium Experiences
3.Private Full-Day – from €900 per group
From Zagreb: Private Transfer to Ljubljana and Lake Bled
- ⭐ Ultimate flexibility and comfort for groups up to 7
- Luxury private car or van with a professional driver
- Customizable day trip from Croatia to Slovenia’s highlights
- Visit Postojna Cave, Lake Bled, and Ljubljana at your pace
- Hassle-free hotel pickup and drop-off in Zagreb
- Ideal for families or those seeking a tailored, exclusive experience
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4.Wine & Wonders – from €199 per person
Postojna Cave, Predjama Castle & Wine Tasting in Vipava
- ⭐ 4.9 stars for a perfect blend of nature, history, and culture
- Small-group tour limited to 8 participants
- Premium wine tasting at a family-run Vipava Valley winery
- Sample 5 local wines paired with cold cuts
- Visit the cave by train and explore the legendary cliff castle
- Walk through vineyards and learn traditional techniques
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Castle Drama
Predjama Castle’s most famous resident, knight Erazem, was besieged for over a year. He used a secret vertical cave shaft to smuggle in fresh cherries to taunt his enemies, proving his castle was impregnable—until a treacherous servant revealed a secret.
Affordable & Budget-Friendly
5.Small Group Value – from €70 per person
Ljubljana: Postojna cave & Predjama castle small group tour
- ⭐ 4.8 stars offering excellent value for money
- Intimate small group tour with a maximum of 8 people
- 5-hour half-day tour from Ljubljana, perfect for tight schedules
- Includes the iconic cave train ride and castle visit
- See stunning stalactites and the unique ‘human fish’
- Expert guides provide engaging stories daily
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6.Budget Combo Tour – from €49 per person
Tour to Postojna Cave and Predjama Castle from Ljubljana
- ⭐ Most affordable combo tour option from Ljubljana
- Small group tour with max 8 people in a comfortable minivan
- 6-hour tour covering both major attractions
- Option to combine with an afternoon Lake Bled tour for great value
- Includes the unforgettable electric train ride through the cave
- Free time to admire Predjama Castle and take photos
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Ready for Magic? ✨
Stepping into Postojna Cave feels like entering another planet. The air is cool, the silence is profound, and then the cavern opens up into a glittering cathedral of stone. It’s a humbling, awe-inspiring experience that stays with you long after you return to the surface.
⭐ Our Top Pick (Likely to Sell Out!)
⭐Ultimate Slovenia Day – from €119 per person
From Ljubljana: Lake Bled, Postojna Cave and Predjama Castle
- ⭐ 5.0 stars for the definitive Slovenian highlights tour
- See three iconic attractions in one unforgettable 10.5-hour day
- Small group limited to 8 people for an intimate experience
- Includes Postojna Cave train ride & Predjama Castle entry
- Traditional Pletna boat ride to Bled Island on the emerald lake
- Visit Bled Castle with panoramic views of the Julian Alps
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What is the Postojna Cave tour from Ljubljana?
The 5-star rated Lake Bled, Postojna Cave & Predjama Castle day tour is our top pick. It combines Slovenia’s top three attractions with a small group, a cave train, a castle visit, and a boat ride on Lake Bled for an unbeatable full-day experience.
Can I visit Postojna Cave and Predjama Castle in one day?
Absolutely. Most tours from Ljubljana, Trieste, or Koper combine both in a 5-6 hour half-day trip. This is the most popular and efficient way to see these two incredible Slovenian landmarks, with transport and tickets included.
What should I wear inside Postojna Cave?
The cave temperature is a constant 10°C (50°F). Wear comfortable walking shoes and bring a jacket or sweater. The paths are well-maintained, but layers are essential for the 90-minute underground adventure.
Are Postojna Cave tours suitable for children and seniors?
Yes. The electric train does most of the distance, and the walking sections are on paved paths. It’s a fantastic family-friendly activity. For those with mobility concerns, check specific tour details as some areas have stairs.
Why book a tour instead of visiting independently?
Booking a guided tour secures your timed entry (essential in peak season), includes hassle-free transport from major cities, and provides expert commentary. You’ll learn about the geology and legends you’d miss on your own.
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Category: Europe, Slovenia
Latest post update: January 2026
