From Ljubljana: Postojna Cave & Predjama Castle Guided Trip
★ 4.6 · 212 reviews
- Six hours, at Postojna Cave and Predjama Castle
- Small group
- Cheapest here
- Free cancellation
Underground train
The Postojna Cave train Slovenia is known for is an electric railway that runs inside the mountain, and it is the single reason this cave is easier than any other cave most people have visited: you ride into the rock sitting down. It is also the most searched thing about the place, which tells you how much of the decision it settles. This site gathers sixteen listings that take you there, from $74 for a guided day trip out of the capital to $729 for a private day priced for the whole group, and between them they carry 6,561 reviews. Almost every one of them is a combined day: the cave first, then Predjama Castle nine kilometres away, and on half of them Lake Bled as well. This page explains what the ride underground is, which listings include the entry ticket, and how to pick the shape of the day rather than the cheapest line on a list.

Quick answer
The short answer. If you want the day most people here have taken, book $130: six hours, the cave and Predjama Castle, the entry tickets and the guided tour included, and 2,846 reviews behind it — the heaviest body of opinion on this site by a wide gap. If you have one day in Slovenia and want it to count, book $192, our top pick: eleven and a half hours, the underground passages and Lake Bled, entry tickets included, 4.8 from 878 reviews. If you are watching the fare, $74 is the lowest here and still six hours with a guide. The ride on the Postojna Cave train Slovenia visitors board is part of the cave visit itself, not a separate ticket you hunt for on the day — what you are choosing between these listings is the shape of the day around it.
The basics
It is an electric railway, and it goes into the mountain. The cave is the most-visited show cave in Europe, and the reason it can carry that many people is the train. Instead of walking in from the entrance, you sit down and the railway takes you through the passages to the point where the walking part of the route begins. That is the whole trick of the place, and it is why a cave visit here suits people who would not normally take on a cave.
It is part of the cave visit, not an extra. Nothing on this page sells a Postojna Cave train Slovenia ride by itself. The listings sell the visit, and the ride underground is how that visit works. What differs between them is whether the entry ticket is included in what you pay us, and four listings say so outright: $192 prints entry tickets in its title, $130 prints tickets and tour, $121 says tickets included, and $158 says with tickets. On the rest, the inclusions line on the operator page is where to check it.
The temperature underground does not move. Around ten degrees, the whole year round. A Postojna Cave train Slovenia visit in February and one in July show you the same thing below ground, which is unusual in this business. Two consequences worth planning for: a jacket is the right call in August as much as in January, and the season outside barely matters to the booking. A day trip in February and a day trip in July see the same thing below ground, which is unusual in this business.
The castle comes with it. Predjama Castle stands in a cliff nine kilometres away, and thirteen of the sixteen listings take both in one run. $137 calls it the only preserved cave castle in Europe; $118 calls it the world’s largest cave castle; $182 tells it through the legend of Slovenia’s local Robin Hood. If you were expecting to buy a cave visit on its own, this is the thing to know before you compare fares: you are mostly looking at two-sight days.
Half a day or a whole one. Every Postojna Cave train Slovenia listing here is one of four shapes. Five run five and a half to seven hours and stay on the cave and the castle. Six run ten to eleven and a half hours out of the capital and add Lake Bled or the Adriatic town of Piran. One leaves from Trieste, four leave from Zagreb and take twelve to thirteen hours, because the driving is most of the day. The fare follows the hours more closely than it follows the sights.
What the ride is not. It is not a scenic mountain railway you photograph from outside, and it is not a ticket that lets you get off where you like: the route through the cave is a guided one and the group moves together. A Postojna cave train inside cave Slovenia search usually turns out to be somebody checking exactly this, and the honest answer is that the railway is transport between the entrance and the walking route, with the guiding around it.

Every trip, current fare
Sixteen listings, grouped by the shape of the day rather than by price: the five half-day runs on the cave and the castle first, then the six full days out of the capital, then the one from Trieste, then the four from Zagreb. Cost per hour divides the fare by the length printed on the listing, and it is a rough guide rather than a verdict. These are combined days: the five and a half hours of a half-day booking and the thirteen hours of a run out of Zagreb include the driving, and driving is not sightseeing. The listings that print a private booking are priced for the group rather than per person, which is why they sit at the top of the column and why they can work out cheaper for four or five people than a seat each on a shared bus.
| Tour | Length | Price | What is included | Cost per hour | Rating |
|---|---|---|---|---|---|
| From Ljubljana: Postojna Cave & Predjama Castle Guided TripOur fare from — 212 reviews | 6 h | $74 | A guided day trip through the winding system of caverns, with a historic castle tour | $12.33 | 4.6 · 212 |
| Ljubljana: Postojna Cave and Predjama Castle TourRated 4.9, five and a half hours | 5.5 h | $79 | Cave and castle with transfer for up to eight people and an English-speaking driver-guide | $14.36 | 4.9 · 490 |
| Postojna Cave & Predjama Castle half-day – tickets includedHalf a day, tickets included | 5.5 h | $121 | The dramatic stalactites and stalagmites, then the castle built into a cave; tickets included | $22.00 | 4.8 · 199 |
| Ljubljana: Postojna Cave & Predjama Castle Tickets and TourThe largest record — 2,846 | 6 h | $130 | The cave and the medieval cave castle of Predjama, described as two of the most precious jewels of Slovenia, tickets and tour | $21.67 | 4.8 · 2,846 |
| Ljubljana: Postojna Cave, Predjama Castle & Boat TourAdds Postojna Cave Park | 7 h | $228 | The cave, Predjama Castle and Postojna Cave Park on a day tour out of the capital | $32.57 | 3.8 · 4 |
| From Ljubljana: Postojna Cave, Predjama Castle, & Piran TourAdds the Adriatic coast | 10 h | $118 | The cave, Predjama — described as the world’s largest cave castle — and the coastal town of Piran, up to eight guests | $11.80 | 4.9 · 459 |
| Ljubljana: Lake Bled, Postojna Cave, and Predjama Day TourNames the cave train outright | 10 h | $131 | A pletna boat to Bled Island, Bled Castle, Predjama, and a train ride into the cave | $13.10 | 4.9 · 288 |
| From Ljubljana: Lake Bled, Postojna Cave and Predjama CastleSmall group, up to eight | 11 h | $127 | Lake Bled, the cave and Predjama in one full day, small group of up to eight people | $11.55 | 4.9 · 178 |
| Slovenia's Prime attractions: Lake Bled & Postojna CaveBled and the karst, rated 4.9 | 10.5 h | $182 | Alpine Bled and its surroundings, the mystic karst of the cave, and the Predjama legend of Slovenia’s local Robin Hood | $17.33 | 4.9 · 64 |
| From Ljubljana: Postojna Cave, Predjama Castle and Lake BledA group day out, rated 4.7 | 11.5 h | $164 | The ancient underground passages and Lake Bled on one group day out of the capital | $14.26 | 4.7 · 228 |
| From Ljubljana: Lake Bled & Postojna Cave with Entry TicketsOur top pick — 878 reviews | 11.5 h | $192 | Two of Slovenia’s attractions in a day: the ancient underground passages and emerald-green Lake Bled, entry tickets included | $16.70 | 4.8 · 878 |
| From Trieste: Postojna Cave & Predjama CastleThe one out of Trieste | 6 h | $137 | The best-known cave in the world and Predjama, the only preserved cave castle in Europe, out of Trieste | $22.83 | 4.8 · 545 |
| From Zagreb: Ljubljana, Postojna Cave & Predjama Castle TourFrom Zagreb, rated 4.9 | 12 h | $134 | Ljubljana, the cave and the striking Predjama Castle on a guided tour from Zagreb | $11.17 | 4.9 · 74 |
| Zagreb: Ljubljana and Postojna Cave Day Tour with ticketsFrom Zagreb, thirteen hours | 13 h | $158 | Ljubljana, the cave and the dramatic Predjama Castle in one day out of Zagreb, with tickets | $12.15 | 4.6 · 85 |
| From Zagreb: Postojna Cave, Lake Bled, Ljubljana Day TripFrom Zagreb, a young listing | 10 h | $302 | The view of Lake Bled, the cave’s tunnels and the streets of Ljubljana with your guide | $30.20 | 4.8 · 3 |
| From Zagreb: Postojna Cave, Bled Lake & Ljubljana - PrivatePrivate, priced for the group | 13 h | $729 | A private, tailored journey through the depths of the cave, Bled Lake and Ljubljana at your own pace | $56.08 | 4.5 · 8 |
Four shapes
The cave is the same cave and the ride underground is the same ride. What changes is how much else you see and how long you sit in a vehicle to see it.
| Shape of the day | How long | What it is good at | Listings and fares |
|---|---|---|---|
| Half a daycave and Predjama Castle | Five and a half to seven hours | The two sights that belong together, with the rest of your day left out of a coach seat | Five listings, $74 to $228 |
| A full day out of the capitalBled or the coast added | Ten to eleven and a half hours | One day that covers the karst underground and either the Alpine lake or the Adriatic, without you driving any of it | Six listings, $118 to $192 |
| From Triesteacross the border | Six hours | The cave and the cave castle for people whose base is in Italy rather than Slovenia | One listing, $137 |
| From ZagrebLjubljana added on the way | Ten to thirteen hours | Three places in a day when Croatia is your base: the capital, the cave and the castle | Four listings, $134 to $729 |

The verdict
If you want the day with the deepest record: $130. 2,846 reviews at 4.8, which is more than the other fifteen listings put together. Six hours out of the capital, the cave and the medieval cave castle of Predjama — described on the listing as two of the most precious jewels of Slovenia — with the tickets and the guided tour included. If you are booking one thing on this site and want the safest evidence behind it, this is it.
If you have a single day in Slovenia: $192. Our top pick. Eleven and a half hours, the ancient underground passages and the emerald-green water of Lake Bled, entry tickets included, 4.8 from 878 reviews. It is the version that treats the cave as half of a day rather than the whole of it, and for a first visit to the country that is usually the right call.
If the fare decides it: $74. Our fare from, 4.6 from 212 reviews, six hours, a guided day trip through what the listing calls a winding system of unforgettable caverns, plus a historic castle tour. It is the cheapest way onto the railway with a guide on this site, and the rating is honest rather than glowing, which is worth reading the recent reviews for.
If you want the guide and the vehicle to yourselves without paying for a private day: $79. 4.9 from 490 reviews — the highest score among the listings with a real body of opinion behind it — five and a half hours, and the listing prints transfer for up to eight people with an English-speaking driver-guide. For a family or two couples travelling together, this is the sensible middle of the site.
If you want the sights named on the page: $131. Ten hours, 4.9 from 288 reviews, and the only listing whose own description spells out the ride into the cave alongside a traditional pletna boat to Bled Island and Bled Castle. It is the clearest itinerary on the site: you know before you pay exactly what the day contains.
If you are based in Italy: $137. Six hours, 4.8 from 545 reviews, the cave that the listing calls the best-known in the world and Predjama, described as the only preserved cave castle in Europe. The same two sights as the half-day runs from the capital, with the border crossing done for you.
If you are based in Croatia: $134 or $158. Twelve and thirteen hours respectively, and both add Ljubljana to the cave and the castle, which is the honest way to spend that much driving. $134 holds 4.9 from 74 reviews, $158 holds 4.6 from 85 and prints tickets included. Read them as a day out of Zagreb rather than as a cave visit.
If it is your group and your pace: $302, $228 or $729. $228 is seven hours and adds Postojna Cave Park to the cave and the castle. $302 is ten hours out of Zagreb with Bled, the cave’s tunnels and Ljubljana. $729 is the private, tailored version: thirteen hours, the itinerary is yours, and the fare is for the group rather than per person, which changes the arithmetic completely once there are four or five of you. These three are young listings — four, three and eight reviews — so what you are buying is the format, not a long record.
Book direct
The half-day runs on the cave and the castle first, then the full days out of the capital, then Trieste and Zagreb, and last the private days where the fare covers the group. Fares and ratings are live off the listing pages.
★ 4.6 · 212 reviews
★ 4.9 · 490 reviews
★ 4.8 · 199 reviews
★ 4.8 · 2,846 reviews
★ 3.8 · 4 reviews
★ 4.9 · 459 reviews
★ 4.9 · 288 reviews
★ 4.9 · 178 reviews
★ 4.9 · 64 reviews
★ 4.7 · 228 reviews
★ 4.8 · 878 reviews
★ 4.8 · 545 reviews
★ 4.9 · 74 reviews
★ 4.6 · 85 reviews
★ 4.8 · 3 reviews
★ 4.5 · 8 reviews

The variables
The fare is the last of them, not the first. Settle these four and the choice of Postojna Cave train Slovenia tour makes itself.
How long you want to be out
This one decides the rest. Half a day is $74, $79 or $130. A full day out of the capital is $131 through $192, and a day out of Zagreb runs to thirteen hours.
Whether you want Lake Bled in the same day
Seven listings add the lake. $192 and $164 take eleven and a half hours to do it, $127 eleven, and $131 and $182 ten and ten and a half. If the lake is already on your itinerary for another day, the half-day cave runs are the better buy.
Whether the entry ticket is included
Four listings say so in their own words: $192, $130, $121 and $158. On the others, read the inclusions line before you pay rather than after you arrive.
How many of you there are
$79 prints transfer for up to eight with a driver-guide, $118 and $127 cap the group at eight, and $729 is priced for the group rather than per person. For four or five people together these are worth pricing out properly.
Straight answers
«Postojna cave Slovenia underground train». The second biggest search about the place, and it is the same railway: electric, inside the mountain, and part of the guided visit rather than a separate attraction. Every listing on this page includes the cave visit, so none of them leaves you standing at the entrance wondering how to get in.
«Postojna cave train inside Slovenia» and «Postojna cave interior train Slovenia». Two ways of asking whether the train really goes in, rather than running along the outside like a tourist land-train. It goes in. The ride is underground, through the passages, and the walking section of the route starts where it stops.
«Postojna cave train stalactites Slovenia» and «Postojna cave train inside stalactites Slovenia». People checking whether the formations start before the walking does. The operators describe dramatic stalactites and stalagmites through the passages the route covers — $121 puts exactly that phrase on its own page — and the lighting is what makes them readable rather than the distance you walk.
«Postojna cave train interior stalactites Slovenia» and «Postojna cave Slovenia underground formations». The same question with the words shuffled, and it is worth answering plainly: what you see down there is limestone built up over a very long time, lit along a paved and railed route. We do not reprint chamber names or measurements on this site, because those belong to the cave management and a wrong number is worse than none.
«Postojna cave train Slovenia family» and «Postojna cave train children Slovenia». Parents working out whether this is a cave a child can manage, and the ride is the reason the answer is usually yes: the hard part of a cave visit is normally the walking in, and here you sit for it. The lengths are the thing to weigh instead — $79 is five and a half hours, while a day out of Zagreb is twelve or thirteen with a small person in a coach seat for most of it. There is a page on this site about the family versions.
«Is the ride included in the fare?» On four listings the entry ticket is printed as included, which covers the visit and the ride with it. On the others, the operator page states what your money buys, and that is the line to read. We do not claim inclusions the listing does not print.
«Can we see the olm?» The cave is home to the olm, the blind amphibian that Slovenia is known for, and it is kept where visitors can look at it. Nobody, including us, can promise you a sighting on the day, and any page that does is selling you something it does not control.
«Which month is best?» Underground, it does not matter: the air sits at about ten degrees in every season. Above ground it decides how the rest of a full day feels, which is an argument for the half-day runs in winter and the ten-hour days in summer. We do not promise weather, on this page or any other.
Mistakes
Five of the six are settled on the listing page, days before anybody books a Postojna Cave train Slovenia day at all.
Thirteen of the sixteen listings take Predjama Castle in the same run, and seven add Lake Bled. That is what the fares are actually for. If you want the cave and nothing else, the shortest listings here are $79 and $121, and they still include the castle.
The Zagreb runs are twelve and thirteen hours because the driving is most of the day. Out of the capital the same two sights take five and a half to seven. Read the length before the fare.
Four listings print it: $192, $130, $121 and $158. On the rest, the inclusions line answers it, and it is a different amount of money depending on the answer.
It is about ten degrees underground whatever the forecast says. People arrive in August in shorts and spend the visit cold; a jacket is the right call in every month.
$302 shows 4.8 from three reviews and $130 shows 4.8 from 2,846. Those are different kinds of fact. A high score on a young listing is a signal; a 4.8 across nearly three thousand people is a record.
Seven listings do both in one, from $127 to $192. If your trip is short, one eleven-hour day costs less and takes less planning than two half-days with two transfers.
Checklist
All five are printed on the listing page you are already looking at.
Five and a half, six, seven, ten, eleven and a half, thirteen. This single line decides whether the booking fits the day you had in mind.
Four listings say so outright. On the others the inclusions line is the answer, and it is worth reading twice.
Predjama Castle on thirteen of the sixteen; Lake Bled on seven; Piran on one; Ljubljana on the Zagreb runs; Postojna Cave Park on $228.
Up to eight people on $79, $118 and $127; $729 is private and priced for the group.
It is shown across the listings gathered here, which means a booking made early is not a commitment you cannot undo.
Wondering what the passages actually look like once the ride stops, and what the lighting shows? That has a page of its own.
See what the interior is like→Common questions
Yes. The railway is how the visit works: you ride into the passages and the walking section of the guided route starts where the train stops. No listing here sells the ride separately.
$130, with 2,846 at 4.8 — more than the other fifteen listings together. The next largest is $192 with 878.
From $74 for a six-hour guided day trip up to $729 for a private thirteen-hour day priced for the group.
Five and a half to seven hours for the half-day runs on the cave and the castle, ten to eleven and a half for a full day out of the capital, six from Trieste, and ten to thirteen from Zagreb.
About ten degrees, steady the whole year round. Bring a jacket whatever the month and whatever the forecast above ground says.
Thirteen of the sixteen do. $137 calls it the only preserved cave castle in Europe and $118 calls it the world’s largest cave castle.
On four listings it is printed as included: $192, $130, $121 and $158. On the others, check the inclusions line on the operator page.
Sixteen, with 6,561 reviews between them: five half-day runs, six full days out of the capital, one from Trieste and four from Zagreb.
Go deeper
The ten listings that leave the capital, and what each day includes.
Inside the caveThe pairing almost every listing sells: the cave and the castle in the cliff.
Predjama CastleThe castle built into a cliff nine kilometres from the cave.
Entrance and tickets