
Ljubljana with Postojna Cave and Predjama Castle
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September 2026
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Who is going?
Adults
Age 13 and over
Children
Age 12 and under
Select a highlighted day to see live departure times and the exact price for your group.
Free cancellation up to 24 hours before. Same price on Viator, Outty earns a commission.
Traveler rating
5.0/5
Based on 4 traveler reviews. Ratings and reviews provided by Viator and Tripadvisor.
Quick answer
Is Ljubljana with Postojna Cave and Predjama Castle worth booking?
Ljubljana with Postojna Cave and Predjama Castle is a 11-hour experience in Zagreb, Croatia, from $140 per person. It scores 66 out of 100 on the Outty Ranking, which we label “Solid Choice”, based on a 5/5 rating across 4 reviews. Cancellation is free up to 24 hours before the start time. Same-day spots are currently showing.
- Outty Ranking
- 66 / 100
- Rating
- 5/5 (4)
- Duration
- 11 hours
- From
- $140 per person
What makes this tour unique: Discover Slovenia’s most iconic sights on a semi-private day trip from Zagreb. Travel in comfort as you explore the charming capital, Ljubljana, with its unique architecture and vibrant local
What you get
About this experience
What makes this tour unique: Discover Slovenia’s most iconic sights on a semi-private day trip from Zagreb. Travel in comfort as you explore the charming capital, Ljubljana, with its unique architecture and vibrant local lifestyle. Continue your journey into the underground wonder of Postojna Cave, the world’s most visited karst cave, where incredible rock formations create a magical atmosphere. Just a short drive away, step into a fairytale at Predjama Castle—the world’s largest cave castle and a Guinness World Record holder. Perched dramatically on a cliffside, it’s one of the most fascinating and unique castles you’ll ever see.
What's included
Included
- Official English speaking tour guide (other languages on request)
- Road tolls and parking
- Pickup and drop-off from Central Hotels in Zagreb
- Transport with a comfortable sedan car or passenger van with WIFI
Not included
- Meals and personal expenses
- Gratuities
- Entrance fees: Postojna Cave(30 €) & Predjama Castle (19 €)
What you'll see and do
Zagreb
Beginning with your hotel pickup in Zagreb at 8am, you will depart the city and ride on a 1.5 hour long drive to Ljubljana, the capital of Slovenia.
Pass by without stopping
Sava River
Once we cross river Sava, we are officially exiting Zagreb and starting our adventure.
Pass by without stopping
While enjoying your relaxing drive and just before crossing the Croatian border, you will see a medieval castle on top of a hill, Castle Mokrice. The castle has a rich history, mentioned already in the 15th century, it was the home of many noble families throughout the centuries, one of them being the famous Auerspergs. It was also used in a music video by the Pet Shop Boys.
Pass by without stopping
Krsko
On the drive we will also pass the city of Krško which is a very important source of energy for both Croatia and Slovenia, Because of the nuclear power plant Krško. It was a joint venture by both governments during the time of Yugoslavia and it provides more than a quarter of Slovenian's and 15% of Croatian's power supply.
Pass by without stopping
Novo Mesto
While on the drive we will pass many quaint villages and towns. One that stands out the most is a lovely town called Novo Mesto. A river town with a rich archaeological heritage.
Pass by without stopping
Dragon Bridge (Zmajski Most)
We will begin a walking tour through the city and explore its many wonderful locations while learning about the rich and complex history. Where once stood a Roman city called Emona today it is Ljubljana, the capital of Slovenia and also its largest city. You will learn about Napoleon's connection to the city, the evolution of Ljubljana through time and many other interesting facts. . It is a beautiful and multicultural place. While on your guided walk tour you will stand in front of the imposing road bridge called the Dragon bridge. The legend says that Jason the founder of Ljubljana joined with his Argonauts and slayed a dragon and that is how the bridge got its name. You will also learn how the bridge evolved through history and how it changed.
15 minutes here
Cathedral of St. Nicholas
Our next stop is the wonderful Ljubljana Cathedral, officially named Saint Nicholas Church. This magnificent structure was built at the start of the 18th century and it was rebuilt several times. What originally started as a Gothic church later evolved into a Baroque building. While walking around the cathedral you will see and learn about the mythic Slovenian doors that tell the entire history of the people of Slovenia. Entrance to the Cathedral is permitted but the entrance fee is 2 euro.
15 minutes here · Admission not included
Jože Plečnik is the most famous Slovenian architect and he is responsible for how Ljubljana looks today and the city's entire identity. Most of his work on the city happened between the two World wars and his urban designs changed how Ljubljana developed through time. You will learn about his inspirations when creating countless squares, parks and streets in the city and also bridges. We will visit the famous Triple bridge, a formation of three public bridges that Jože Plečnik designed.
15 minutes here
To finish our walking tour through Ljubljana we will visit the central square called Prešeren Square. It is located in the old town area and it's the true heart of the city. All major events in Ljubljana happen around Prešeren square, from festivals, political events and concerts. You will learn about how the square got its name in connection to a famous Slovenian poet France Prešeren and his tragic love affair with a mysterious woman called Julia.
15 minutes here
Ljubljana
Free time to enjoy Ljubljana and explore various restaurants and cafe's.
90 minutes here
Logatec
On our drive we will pass by this quaint town which was once eight seperate villages.
Pass by without stopping
Postojna
A town that offers various museums, galleries and festivals including medieval tournaments.
Pass by without stopping
You will get the chance to visit an amazing Renaissance castle that lies in the mouth of a cave. Predjama castle has a rich history but it became truly known when a famous knight, Erasmus of Lueg, used it as his home. The castle is also prominent in pop culture, it was used in a Jackie Chan movie "Armour of God" and also as a location for the hit Netflix show The Witcher. You will be provided with audio guide that will take you through the castle.
60 minutes here · Admission not included
To finish the tour we will go on a guided tour through the Postojna Cave Park, the second longest cave system in Slovenia. The cave and its countless stalagmites, stalactites, formations, was first discovered in the 17th century. Archduke Ferdinand visited the caves in 1819 and became its first official tourist. From then the cave was transformed into a tourist destination. Still during war times it was also used as an ammunition storage. You will learn this and much more while exploring the cave system.
90 minutes here · Admission not included
Where it starts and ends
Meeting point
Zagreb
The meeting point is the Nikola Šubić Zrinski Square and the guests can wait in front of the meteorological pole
Hotel pickup
Pickup is available for selected locations. Pickup begins about 15 minutes before departure.
Ends at
The meeting point is the Nikola Šubić Zrinski Square and the guests can wait in front of the meteorological pole
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 15 travelers per booking
- Operated by
- Toural
Know before you go
- Public transportation options are available nearby
- Specialized infant seats are available
- Suitable for all physical fitness levels
- Tour duration includes the travel time and walking throughout the destination.
Photos





What travelers are saying
Outty’s summary of the themes that recur across 4 traveler reviews. Written by us, not quoted from reviewers.
Knowledge and storytelling
3 mentionsReviewers describe the commentary as informative rather than scripted.
The guide
2 mentionsTravelers single out the guide as the reason the experience works.
Good for families
1 mentionReviewers traveling with kids report it landed well with their group.
Small groups
1 mentionThe group size is repeatedly described as intimate rather than packed.
Traveler reviews
4 verified traveler reviews for Ljubljana with Postojna Cave and Predjama Castle. Ratings and reviews provided by Viator and Tripadvisor.
Slovenia
Andreja is an excellent driver She is very knowledgeable in all, history, sociology, and a great storyteller; all that makes a great guide 😊
via Viator
A fulfilling day.
The old town of Ljubljana was a very beautiful and sophisticated city. The Postojna Cave was a series of wonders. It was a satisfying day for me to visit the point on this small group tour.
Response from the operator: 嬉しいお言葉をありがとうございます!リュブリャーナ旧市街やポストイナ鍾乳洞をお楽しみいただけて何よりです。少人数ツアーで心地よく過ごしていただけたこと、大変嬉しく思います。またぜひお会いできる日を楽しみにしております!
via Tripadvisor (translated)
Today we had a lovely day with Andrea. She truly made the experience special by sharing fascinating stories and insights about the places we visited. We were traveling with kids in our group, and Andrea was incredibly attentive and thoughtful, making sure everyone was engaged and comfortable. Her energy, knowledge, and kindness turned a good tour into a memorable one.
Response from the operator: Thank you so much for your wonderful review! We’re delighted to hear that Andrea made your day special, keeping everyone engaged and comfortable, especially with kids in the group. Her energy, knowledge, and kindness truly make the experience memorable. We’d be thrilled to welcome you on another tour soon!
via Tripadvisor
Fun day in the caves!
We had an amazing tour with Patrik. He was a great driver, very informative and the tour was very fun! We loved seeing the cave and the castle as well as the beautiful city of Ljubljana. We debated whether to do this or Lake Bled but ultimately felt this was more unique and we did not regret it!
Response from the operator: Thank you so much for your wonderful review! We’re delighted to hear that Patrik made your tour fun, informative, and memorable.
via Viator
Good to know
- Duration
- 11 hours
- Free cancellation
- Up to 24h before
- Minimum age to book
- All ages
- Availability
- Bookable today
- Runs on
- Every day
- Hotel pickup
- Available for selected locations
- Booked in 30 days
- 1
- Verdict
- Solid Choice
Why this scores 66
The Outty Ranking is a weighted composite. Here is how this experience performed on each component.
Ljubljana with Postojna Cave and Predjama Castle: questions travelers ask
Practical detail on this experience, plus the wider planning questions for Zagreb.
How much does Ljubljana with Postojna Cave and Predjama Castle cost?
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Prices start at $140 per person. The final price depends on the date, the time slot and the number of travelers, and peak weekends in Zagreb usually price higher than midweek mornings. Live pricing and remaining availability are confirmed on the booking screen before you pay.
How long does Ljubljana with Postojna Cave and Predjama Castle take?
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Plan for about 11 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 Zagreb is not rushed.
Is Ljubljana with Postojna Cave and Predjama Castle worth it?
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It holds an Outty Ranking of 66 out of 100, which we label "Solid Choice". That score blends traveler sentiment (5/5 across 4 reviews), the depth of that review evidence, recent booking momentum, value for money against comparable last minute in Zagreb, and how flexible the cancellation terms are.
Can I cancel or reschedule Ljubljana with Postojna Cave and Predjama Castle?
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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 with Postojna Cave and Predjama Castle suitable for kids and families?
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Yes, all ages are welcome. Families should still weigh the 11-hour running time, and strollers are easier on the earlier, quieter departures.
How far in advance should I book Ljubljana with Postojna Cave and Predjama Castle?
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Around 1 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 Zagreb 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 Zagreb and add a light layer if any part of the 11-hour experience runs outdoors or after sunset.
Where does Ljubljana with Postojna Cave and Predjama Castle 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 Zagreb 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 Zagreb?
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On Outty we rank every Zagreb experience on the same 0 to 100 scale, and alongside this one the highest scorers right now include Communism & Croatian Homeland War Tour, Zagreb Highlights: Old Town, WWII tunnels, Funicular & Tastings, Old Zagreb Private 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 Zagreb?
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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 Zagreb?
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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.
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