
Ljubljana: Postojna cave & Predjama castle small group tour
Traveler rating
4.8/5
Based on 174 traveler reviews. Ratings and reviews provided by Viator and Tripadvisor.
Quick answer
Is Ljubljana: Postojna cave & Predjama castle small group tour worth booking?
Ljubljana: Postojna cave & Predjama castle small group tour is a 5.5-hour experience in Ljubljana, Slovenia, from $81 per person. It scores 84 out of 100 on the Outty Ranking, which we label “Exceptional”, based on a 4.8/5 rating across 174 reviews. Cancellation is free up to 24 hours before the start time. Same-day spots are currently showing.
- Outty Ranking
- 84 / 100
- Rating
- 4.8/5 (174)
- Duration
- 5.5 hours
- From
- $81 per person
Visit two of Slovenia’s top attractions in one afternoon on this small-group, half-day tour from Ljubljana. Begin at Predjama Castle, perched on a cliff high above the beautiful Inner Carniola region. Explore the chambers and stairwells and learn about the castle’s most famous resident, Erazem of Predjama. Then, continue to Postojna Cave. Ride a mini-train deep into the famous cave and tour the ethereal network of stalactites, stalagmites and caverns with a local guide. Numbers limited to eight people, ensuring a personalized experience. Postojna Cave is the best-known cave in the world. It is also the greatest tourist attraction in Slovenia and one of the world's largest Karst monuments and it is a must-see attraction when visiting Slovenia. You will start the tour with a unique and adventurous ride with a special train in one of the most diverse cave systems in the world, with 21 km of passages, galleries and magnificent halls, which offer an unparalleled experience of the underground world and a large diversity of underground animals – including the world-famous human fish (proteus anguinus). Beside Postojna Cave you will also have the chance to visit Predjama Castle. Our guide will show you this magnificent medieval castle perched high up in a vertical cliff in the idyllic village of Predjama. It is an interesting and romantic sight throughout the year: in the spring and summer its surroundings are abundant with blossoms and flowers, in the autumn it is clad in the colours of surrounding forests and it is at its most enchanting in the winter when the surrounding area is covered in snow.
What you get
About this experience
Visit two of Slovenia’s top attractions in one afternoon on this small-group, half-day tour from Ljubljana. Begin at Predjama Castle, perched on a cliff high above the beautiful Inner Carniola region. Explore the chambers and stairwells and learn about the castle’s most famous resident, Erazem of Predjama. Then, continue to Postojna Cave. Ride a mini-train deep into the famous cave and tour the ethereal network of stalactites, stalagmites and caverns with a local guide. Numbers limited to eight people, ensuring a personalized experience. Postojna Cave is the best-known cave in the world. It is also the greatest tourist attraction in Slovenia and one of the world's largest Karst monuments and it is a must-see attraction when visiting Slovenia. You will start the tour with a unique and adventurous ride with a special train in one of the most diverse cave systems in the world, with 21 km of passages, galleries and magnificent halls, which offer an unparalleled experience of the underground world and a large diversity of underground animals – including the world-famous human fish (proteus anguinus). Beside Postojna Cave you will also have the chance to visit Predjama Castle. Our guide will show you this magnificent medieval castle perched high up in a vertical cliff in the idyllic village of Predjama. It is an interesting and romantic sight throughout the year: in the spring and summer its surroundings are abundant with blossoms and flowers, in the autumn it is clad in the colours of surrounding forests and it is at its most enchanting in the winter when the surrounding area is covered in snow.
What's included
Included
- Central Ljubljana meeting point
- Comfortable transport by air-conditioned minivan
- Professional English speaking guide
Not included
- Postojna Cave & Predjama Castle combined ticket: from 45 € per person (dynamic prices)
- Postojna cave only: from 33 € per person
What you'll see and do
Predjama Castle
Tour of Predjama Castle
60 minutes here · Admission not included
Postojna Cave
Tour of Postojna cave
90 minutes here · Admission not included
Where it starts and ends
Meeting point
Ljubljana
opposite City Hotel
Hotel pickup
No pickup: everyone meets at the start point.
Ends at
opposite City Hotel
Before you book
- Cancellation
- For a full refund, cancel at least 24 hours before the scheduled departure time.
- Languages
- en
- Ticket
- Mobile Only
- Runs on
- Every day
- Group size
- Up to 8 travelers per booking
- Operated by
- Gray Line Slovenia I Slovenia Explorer
Know before you go
- Travelers should have at least a moderate level of physical fitness
- Minimum numbers apply. There is a possibility of cancellation after confirmation if there are not enough passengers to meet requirements. In the event of this occurring, you will be offered an alternative or full refund.
- Not wheelchair accessible.
- Please keep in mind that there are quite a few stairs at the Predjama castle, but you would do that in a fairly slow pace.
- Small group tour - up to 8 people per van.
- Warm and comfortable clothes and footwear are essential to visit the Postojna cave (temperature in the cave is 9°C / 48 Fahrenheit).
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What travelers are saying
Outty’s summary of the themes that recur across 174 traveler reviews. Written by us, not quoted from reviewers.
The guide
8 mentionsTravelers single out the guide as the reason the experience works.
Knowledge and storytelling
6 mentionsReviewers describe the commentary as informative rather than scripted.
Photo opportunities
3 mentionsThe views and photo stops come up again and again.
Organization
3 mentionsPickup, timing, and logistics are described as running smoothly.
Food and drink
2 mentionsThe tastings and food stops are a highlight for most reviewers.
Traveler reviews
174 verified traveler reviews for Ljubljana: Postojna cave & Predjama castle small group tour. Ratings and reviews provided by Viator and Tripadvisor.
A great trip visiting two must see places.
A great trip combining two excellent places. Mini bus very comfortable and plenty of space. Brilliant communication and clear instructions from Viator from booking til the morning of the trip. Easy to find meeting point. Caves were incredible and the castle very interesting. Well worth visiting.
Response from the operator: Thank you, Anne. Clear instructions from booking to the morning of the trip, an easy meeting point and a van with room to stretch are the parts of the day people rarely mention, so it is nice when someone does. Glad the cave and the castle both earned “well worth visiting” 🙏
via Viator
Postjama Caves & Castle
Caves were amazing, highly recommend. Our tour guide was excellent. We had sick kids and luckily ended in private family tour only. He was accommodating and knowledgeable. Went to castle for a quick visit. Amazing
Response from the operator: Sick kids and travel are a tough mix, Ruben, so we are glad the day could bend around your family and that the guide read the situation well. That is the quiet advantage of a small group, when numbers are low the day becomes yours. Hope everyone was back on form soon, and thank you for the recommendation 🙏
via Viator
The walk in the cave is...
The walk in the cave is not for the faint of heart several km and a large crowd of people at each stop, but was very pretty and would still recommend! The train into the cave was like a Disney ride but slower. Would recommend bringing a snack as the tour day is packed tight.
Response from the operator: Honest descriptions like yours are exactly what help the next traveller decide, Tammy, so thank you for writing one 🙏 The cave is a few kilometres on foot once the train drops you off, and in high season the timed groups inside are busy, that part is the cave's to manage, not ours. Glad it still earned a recommend, and the snack advice is a good one for a day this full.
via Viator
Highly recommend
A fantastic trip to the cave and castle. The cave is very crowded but everyone moves along at a good pace. We loved the castle and the whole setting of it is spectacular. Our guide Andreas was fantastic- very informative and knowledgeable and we learnt so much about Slovenia. He ensured we had a great time.
Response from the operator: Thank you, Anne. Postojna does draw a crowd, so we are glad the pace kept things moving and that Predjama, with that setting built into the cliff, more than made up for it. Learning so much along the way is exactly what a good guide adds, and we are so glad yours did. Come back and see more of Slovenia sometime.
via Viator
Great tour! Great guide!
We had a great day with Luka despite the rain. They came to her was amazing. It was so fun to ride the train into the cave and then spend an hour walking around looking at the amazing formations that took millions of years to form. The guides were very informative and didn't rush you get plenty of time to take pictures which we did a lot of. From there we went to the castle that is built into a cliff which was extremely beautiful. Lucas very knowledgeable and told us about the history of Slovenia and the castle in the surrounding area. On the way back the traffic was at a complete stand still on the freeway. Luca checked his GPS and drove us through the countryside which was a lot better views and a much more enjoyable drive and he's saved at least an hour of time that we would have been sitting in traffic. It was a really fun day and we had enough time to enjoy everything we did.
Response from the operator: Thank you, Alexandria, what a great account of the day. Rain or shine, the cave and that cliff castle deliver, and we love that you had time to actually take your photos rather than being hurried through. And the traffic save is exactly the kind of quick thinking we hope for, turning a standstill into a nicer drive through the countryside and an hour back in your day. So glad it was such a fun one, and we will pass your thanks to your guide.
via Viator
Good to know
- Duration
- 5.5 hours
- Free cancellation
- Up to 24h before
- Minimum age to book
- All ages
- Availability
- Bookable today
- Runs on
- Every day
- Price range
- $81 to $88
- Hotel pickup
- No pickup, meet at start point
- Booked in 30 days
- 61
- Verdict
- Exceptional
Who runs this experience
Operated by Gray Line Slovenia I Slovenia Explorer, who run 9 experiences we rank across 1 city, with an average Outty Ranking of 73.4 and 1 in the 90+ Club.
See everything Gray Line Slovenia I Slovenia Explorer runsWhy this scores 84
The Outty Ranking is a weighted composite. Here is how this experience performed on each component.
Ljubljana: Postojna cave & Predjama castle small group tour: questions travelers ask
Practical detail on this experience, plus the wider planning questions for Ljubljana.
How much does Ljubljana: Postojna cave & Predjama castle small group tour cost?
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Prices start at $81 per person. The final price depends on the date, the time slot and the number of travelers, and peak weekends in Ljubljana usually price higher than midweek mornings. Live pricing and remaining availability are confirmed on the booking screen before you pay.
How long does Ljubljana: Postojna cave & Predjama castle small group tour take?
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Plan for about 5.5 hours from start to finish, not counting travel to the meeting point. Most travelers leave another 30 minutes on either side so the rest of the day in Ljubljana is not rushed.
Is Ljubljana: Postojna cave & Predjama castle small group tour worth it?
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It holds an Outty Ranking of 84 out of 100, which we label "Exceptional". That score blends traveler sentiment (4.8/5 across 174 reviews), the depth of that review evidence, recent booking momentum, value for money against comparable last minute in Ljubljana, and how flexible the cancellation terms are.
Can I cancel or reschedule Ljubljana: Postojna cave & Predjama castle small group tour?
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Yes. Cancel free up to 24 hours before the start time for a full refund. Inside that window the booking is non-refundable, and no-shows are not refunded.
Is Ljubljana: Postojna cave & Predjama castle small group tour suitable for kids and families?
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Yes, all ages are welcome. Families should still weigh the 5.5-hour running time, and strollers are easier on the earlier, quieter departures.
How far in advance should I book Ljubljana: Postojna cave & Predjama castle small group tour?
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Around 61 people booked this in the last 30 days, so popular slots go early. Two to three weeks ahead is comfortable in shoulder season, while summer weekends and holidays in Ljubljana can sell out a month out. Same-day spots do open up when other travelers cancel, so it is worth checking if you are already in town.
What should I bring or wear?
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Bring photo ID, your booking confirmation on your phone, a refillable water bottle and comfortable shoes. Dress for the weather in Ljubljana and add a light layer if any part of the 5.5-hour experience runs outdoors or after sunset.
Where does Ljubljana: Postojna cave & Predjama castle small group tour start and how do I get there?
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The exact meeting point and directions are on your voucher once you book, and they sit in central Ljubljana within reach of public transport. Arrive 15 minutes early: late arrivals are treated as no-shows by most operators.
What are the best things to do in Ljubljana?
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On Outty we rank every Ljubljana experience on the same 0 to 100 scale, and alongside this one the highest scorers right now include Slovenia in One Day: Small-Group Bled, Postojna Cave & Predjama, Postojna Cave and Predjama Castle - Entrance Tickets Included, Ljubljana Small Group Food Walking Tour. The city page groups everything into most popular, highest reviewed, last minute and family-friendly so you can build a day around what actually delivers.
When is the best time to visit Ljubljana?
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Booking patterns follow the same curve: prices and queues climb in peak weeks, while shoulder season gives you better availability on the top-ranked experiences and more room to change plans.
How many days do you need in Ljubljana?
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Three full days covers the headline sights without sprinting. A workable rhythm is one anchor experience each morning, such as this one, an unhurried afternoon in a single neighborhood, then a food or nightlife booking in the evening. Five days lets you add a day trip outside the city.
Do I book through Outty or through the operator?
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Outty ranks and explains the experiences, then hands you to Viator to complete the booking with the operator directly. The price is the same as booking on Viator yourself, and Outty earns an affiliate commission on the referral, which is how the rankings stay free to read.
What is included in Ljubljana: Postojna cave & Predjama castle small group tour?
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Included: Central Ljubljana meeting point; Comfortable transport by air-conditioned minivan; and Professional English speaking guide. Not included: Postojna Cave & Predjama Castle combined ticket: from 45 € per person (dynamic prices); and Postojna cave only: from 33 € per person. Always check the voucher for the final list before you travel.
Where is the meeting point for Ljubljana: Postojna cave & Predjama castle small group tour?
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opposite City Hotel Hotel pickup is not included, so plan your own transport and arrive 15 minutes early.
What languages is Ljubljana: Postojna cave & Predjama castle small group tour offered in?
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It runs in English. Pick your language when choosing a date and time, as not every departure runs in every language.
Will I get instant confirmation and a mobile ticket for Ljubljana: Postojna cave & Predjama castle small group tour?
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Confirmation is sent by the operator after booking, usually within 48 hours; if it is not confirmed you are not charged. Mobile tickets are accepted, so you can show the voucher on your phone.
Is Ljubljana: Postojna cave & Predjama castle small group tour wheelchair or stroller accessible?
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The operator notes: Not wheelchair accessible. If accessibility is critical, contact the operator after booking to confirm arrangements for your date.
What happens to Ljubljana: Postojna cave & Predjama castle small group tour if the weather is bad?
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It generally runs rain or shine, so dress for the forecast in Ljubljana. Standard cancellation terms apply: free cancellation up to 24 hours before the start.
What do travelers say about Ljubljana: Postojna cave & Predjama castle small group tour?
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Across 174 reviews averaging 4.8 out of 5, recurring themes include the guide, knowledge and storytelling, photo opportunities. Travelers single out the guide as the reason the experience works.
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