Postojna Cave Tickets 2026: Prices, How to Book & What to Expect

Yes. The Postojna Cave + Predjama Castle combined ticket costs €40.30 for adults, roughly 10% less than buying each ticket separately (€44.80 total). If you plan to see both, and you absolutely should, the combo is the way to go.

Predjama Castle sits just 9 km from the cave, perched halfway up a 123-meter cliff face. It holds the Guinness World Record as the largest cave castle in the world and dates back more than 800 years. The drive between the two takes about 10 minutes, and many visitors do both in a single half-day trip.

The park also sells a "Triple Adventure" package that adds the Vivarium (home to the olm and other cave creatures) and the Expo cave exhibition. This package runs €46.60 in high season and is worth considering if you are traveling with children who want a closer look at the famous "baby dragons."

For context, a separate Predjama Castle ticket costs €16.90 in high season. By purchasing the combo, a family of two adults and two children (ages 6-15) saves approximately €12 compared to buying everything individually. That covers a couple of coffees at the park cafe afterward.

Go to postojnska-jama.eu, select your date and tour time, choose your ticket type, and pay by card. You will receive a QR code by email that you either print or show on your phone at the entrance.

The booking process takes about three minutes. Here is the step-by-step:

1. Visit the official Postojna Cave Park website and select "Tickets"
2. Pick your preferred date on the calendar
3. Choose a tour departure time (tours run hourly in peak season, less frequently in winter)
4. Select the number of adults, students, and children
5. Add any extras: Predjama Castle, Vivarium, Expo, or the full package
6. Complete payment with a credit or debit card
7. Check your email for the confirmation with QR codes

If your plans change, you can reschedule your tour time free of charge as long as you do so at least 24 hours before the original booking. Changes made less than 24 hours ahead cost €2 per ticket. Full refunds are not available, but date changes within the same season are straightforward.

You can also purchase tickets at the ticket office on arrival, but expect queues of 20-40 minutes during peak season. The online route is faster and guarantees your spot on your preferred tour.

Postojna Cave is open every day of the year, including public holidays. Tour frequency varies by season: hourly departures from 9:00 to 17:00 in July and August, every two hours from 10:00 to 16:00 in the shoulder months, and just two to three tours per day in winter.

Here is the typical 2026 schedule:

Arrive at least 30 minutes before your tour time. This gives you time to pass through the ticket check, use the restrooms, and walk to the cave entrance. The train departs exactly at the scheduled time and will not wait for latecomers.

Predjama Castle follows its own schedule and stays open from 9:00 to 19:00 in summer and 10:00 to 16:00 in winter. Since both are within the same park system, you can visit the castle before or after your cave tour at any time during opening hours.

The 90-minute tour begins with a 3.5 km ride on an electric underground train, the world's only double-track cave railway. You then walk 1.5 km along an easy, paved path through chambers filled with stalactites, stalagmites, and calcite columns, before the train returns you to the entrance.

The train section is genuinely fun. It runs at a reasonable clip through narrow passages, past enormous rock formations illuminated in soft yellow light. The air rushes past at a constant 10 °C, and the smell is clean, mineral, slightly damp. Hold onto hats and scarves, as the breeze picks up in the tighter sections.

Once you step off the train at the Grand Hall, a guide takes over. Tours are available in Slovenian, English, Italian, and German. If your language is not among those, audio guides cover 19 languages total. The walking portion passes through the most photogenic sections of the cave: the Spaghetti Hall with its impossibly thin stalactites, the White Hall where the formations are pure calcite, and the Concert Hall, a 10,000-capacity space that has hosted actual performances.

The path is flat, paved, and accessible to visitors with mobility aids. Handrails line the steeper sections, and there are no stairs. Parents with strollers manage fine, though the cave's constant 10 °C temperature means layering up for young children.

Near the end of the walking route, you pass the Vivarium window where you can spot the olm, a blind, pinkish-white amphibian that lives exclusively in Dinaric cave systems. Slovenians call it the "human fish" because of its skin tone. In 2016, Postojna's olm laid eggs and successfully hatched babies for the first time in captivity, a moment that made international news.

Postojna Cave sits 53 km southwest of Ljubljana. By car, the A1 motorway gets you there in about 45 minutes. By bus, Arriva Slovenia runs direct services that take 45-50 minutes and cost €5-6 one way.

Here are your options in detail:

By car: Take the A1 motorway toward Koper and exit at junction 41 (Postojna). The cave park is 2 km from the exit. Parking at the cave costs €6 for the day. In July and August, the main car park fills by mid-morning and you may be directed to an overflow field.

By bus: The most budget-friendly option. Buses depart from Ljubljana bus station (Avtobusna postaja Ljubljana) and stop directly at "Postojnska jama" (the cave entrance). Check schedules at ap-ljubljana.si. Buses run several times daily.

By train: Trains from Ljubljana reach Postojna station in about 1 hour 12 minutes. From the station, you can either walk 25 minutes to the cave or use the free shuttle bus that Postojna Cave Park runs in partnership with Slovenian Railways (SZ). The package deal includes a return train ticket from any SZ station to Postojna plus the shuttle.

If you are visiting from the Slovenian coast, Koper to Postojna takes about 40 minutes by car. From Piran, add another 20 minutes.

The cave interior stays at a constant 10 °C with 95% humidity year-round. Wear closed-toe shoes with grip and bring a jacket, even if it is 35 °C outside. The temperature drop from summer heat to cave chill can be a real shock.

Photography is allowed inside Postojna Cave, which is not the case at Skocjan. Flash photography is discouraged because it can affect the cave ecosystem, but phone cameras work fine in the well-lit sections. The train ride is particularly photogenic, so have your camera ready before boarding.

The cave park has a restaurant, a gift shop, and a small cafe near the entrance. Prices are tourist-level (expect €3-4 for a coffee, €10-15 for a lunch plate). For cheaper options, the town of Postojna is a 10-minute drive and has several local restaurants where a full meal runs €8-12.

The cave is fully accessible for wheelchair users and visitors with limited mobility. The train has designated spaces, and the walking path is paved and flat throughout. Guide dogs are also permitted. If you need special assistance, contact the park in advance via their website.

Wi-Fi is available at the park entrance but not inside the cave. Mobile signal drops out about 200 meters in. If you need to reach someone, do so before entering.

Beyond the main cave tour, the park includes the Vivarium (a living laboratory for cave creatures), the Expo Postojna Cave exhibition, Predjama Castle, and seasonal adventure tours that take you off the standard path into wilder cave sections.

The Vivarium is small but well-designed. It houses proteus anguinus (the olm), plus other cave-adapted species: cave beetles, cave spiders, and various crustaceans. For anyone interested in biology, this is the highlight. It takes about 30-40 minutes to walk through at a relaxed pace and is included in the "Triple Adventure" combo ticket.

Predjama Castle deserves at least an hour. The castle is built directly into the cave mouth of a cliff face, with a secret passage running through the cave network behind it. The audioguide tells the story of Erazem of Predjama, a 15th-century knight who held out against a siege for over a year using these hidden passages to resupply. During summer months, a medieval tournament reenactment takes place in the field below the castle.

Adventure tours run on select dates and take small groups into sections of the cave not accessible on the standard tour. These cost €100+ per person and involve helmets, headlamps, and some scrambling. They run approximately 4 hours and need to be booked well in advance.

May and September give you the best balance of pleasant weather, reasonable crowds, and lower ticket prices. July and August are the busiest months with the highest prices and longest queues. Winter visits are quiet and atmospheric but tours run only two to three times daily.

Since the cave temperature holds steady at 10 °C regardless of what is happening above ground, the season affects only the crowds and logistics, not the cave itself. A January tour shows you the same formations in the same lighting as an August one, just with fewer people around.

One genuinely special time to visit is December through early January, when the cave hosts its annual Living Nativity scene. Actors perform the nativity story inside the cave chambers, lit by torches and candles. It is the largest underground nativity performance in the world and sells out quickly, so book early if visiting around Christmas.

For combining a cave visit with wider Slovenia travel, late spring and early autumn are ideal. The Inner Carniola countryside surrounding Postojna is green and lush during these months, making the drive part of the trip.