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Experience the best of Postojna Cave & Predjama Castle

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Just an hour from Ljubljana, Postojna Cave is one of the easiest and most rewarding day trips in Slovenia. With a guided underground tour, a unique cave train ride, and zero hiking required, it’s completely doable in half a day, making it perfect if you want a standout experience without long travel or complex planning.

Overview:

  • Distance from Ljubljana: ~50 km (31 mi)
  • Typical travel time: ~1 hour one way
  • On-site visit duration: ~2–2.5 hours (90-min guided cave tour)
  • Cost range: Mid-range; varies by ticket type and transport option
  • Best season/time of year: April to October, with early morning time slots being the best choice for fewer crowds and smoother entry
  • Meeting/drop-off point:
    • Self-drive: Postojna Cave Visitor Centre
    • Guided tours: Central Ljubljana pickup points
  • Key attractions covered:
    • Underground electric train ride
    • Guided walk through cave chambers
    • Stalactites, stalagmites, and the famous “Brilliant” formation
  • Recommended tours & tickets:
    • Postojna Cave Guided Tour
    • From Ljubljana: Postojna Cave & Predjama Castle Guided Tour

What to expect at Postojna Cave

Tourists riding a toy train inside Postojna Cave, Slovenia.
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Underground train ride

Start your visit with an electric train ride that takes you 3.7 km into the cave’s vast underground network. It’s the only double-track cave railway in the world and a highlight in itself.

Guided cave walk

Step off the train and follow a guide through enormous halls filled with towering stalactites and stalagmites. Along the way, you’ll learn how these formations took millions of years to form.

Constant cool climate

The temperature inside the cave stays at a steady 10°C all year, no matter the season outside. Carry a light jacket and comfortable walking shoes even in the summer.

Unique wildlife

Postojna Cave is home to the rare olm, also known as the “baby dragon,” a species found nowhere else. Seeing these cave-dwelling creatures adds a fascinating biological layer to the visit.

Easy pathways

The route follows wide, paved, and well-lit paths designed for smooth walking. This makes the experience accessible for families, older visitors, and anyone visiting a cave for the first time.

What to know before booking Postojna Cave tickets & tours

  • If you’re visiting independently, the Postojna Cave guided tour is the most straightforward option. It includes the full guided cave tour and the iconic underground train ride, letting you explore Europe’s most famous karst cave at a relaxed pace.
  • To see more in one visit, choose a combo of Postojna Cave & Predjama Castle guided tours. This bundled option covers both the cave and the dramatic cliffside castle nearby, saving time and money compared to buying separate tickets.
  • Traveling from the city? Day trips from Ljubljana combine round-trip transport with entry tickets to Postojna Cave, often adding Predjama Castle for a well-paced half-day experience. These are ideal if you want a hassle-free visit without renting a car or navigating schedules.
  • For a fuller Slovenia itinerary, opt for multi-destination day tours that pair Postojna Cave with highlights like Lake Bled, and Piran. These longer tours are best if you want to cover multiple must-see sights in a single day with a guide handling all logistics.

Choose the right experience for you

Postojna Cave guided tour

This option focuses only on Postojna Cave and includes a guided visit through the cave system. You’ll experience the underground train ride and walk through the main cave sections with a guide.

Best for: travelers who want to visit Postojna Cave on its own without adding other destinations

Recommended tour:

  • Postojna Cave Guided Tour

Day trips from Ljubljana

These guided day trips include transportation from Ljubljana and cover Postojna Cave along with additional destinations. They are designed as structured itineraries that let you visit multiple highlights in a single day without planning logistics.

Best for: visitors staying in Ljubljana who want a hassle-free day trip

Recommended tours:

  • From Ljubljana: Postojna Cave & Predjama Castle Guided Tour

Combo tours

Combo tours bundle Postojna Cave with Predjama Castle, and in some itineraries also include Lake Bled or the coastal town of Piran. These experiences let you cover Slovenia’s top cave, historic landmarks, and scenic highlights in a single, well-structured day.

Best for: visitors staying in Ljubljana who want a hassle-free day trip

Recommended tours:

  • From Ljubljana: Lake Bled, Postojna Cave & Predjama Castle
  • From Ljubljana: Postojna Cave, Predjama Castle and Piran Tour

Must-see highlights at Postojna Cave

Tourists on a train ride inside Postojna Cave, Slovenia.

Underground cave train

Begin your visit with a 3.7 km electric train ride that takes you deep into the cave system. It’s the world’s only double-track cave railway and one of Postojna’s most unforgettable moments.

Stalactites and stalagmites inside Postojna Cave, Slovenia.
Guests walking through illuminated stalactites in Postojna Cave tour.
Olm, Proteus anguinus, in a cave environment.
Stalactites and stalagmites inside Postojna Cave, Slovenia.

Plan your visit

Postojna Cave interior with aquarium display and stalactite formations.

Open: 10am–3pm (hours vary seasonally)

Last entry: 1.5 hours before closing

Duration: It takes about 1.5 hours to explore the cave including the train ride

Tour guide with tourist exploring stalactites in Postojna Cave, Slovenia.
  • Book a 10am slot for a quieter experience and smoother entry before larger tour groups arrive.
  • Weekdays are noticeably less crowded than weekends, especially outside of school holidays.
  • April to June and September to October offer the best balance of comfortable travel conditions and fewer crowds. 
  • July and August fall in peak season with the highest visitor numbers, while November to March is the quietest period, with fewer daily tour slots available.

Address: Jamska cesta 30, 6230 Postojna, Slovenia | Find on Maps

  • By bus: Intercity buses run regularly from Ljubljana Bus Station to Postojna. From Postojna town, you can take another bus to Caves Castle Bus Station.
    Nearest stop: Caves Castle Bus Station (5 mins walk)

  • By train: Trains operate from Ljubljana Railway Station to Postojna Station throughout the day. From the station, the cave is a short taxi or local bus ride away.
    Nearest station: Postojna Railway Station (7 mins by taxi)

  • By car: Postojna Cave is easily reached via the A1 motorway and is about 1 hour from Ljubljana. The route is well-signposted and straightforward for self-drivers.
    Parking: Large paid parking areas are available on-site.

Main entrance (Postojna Cave Visitor Centre)

All visitors enter Postojna Cave through the Postojna Cave Visitor Centre. This is where tickets are checked, guided tour groups are assembled, and the underground train ride begins. You’ll also find restrooms, a café, and visitor services here, making it the starting point for every cave visit.

Man holding smartphone displaying free WiFi icon.
  • Visitor centre amenities: The Postojna Cave Visitor Centre offers restrooms, a café, souvenir shops, and ticketing services, all located before entering the cave system.
  • There is limited storage available at the visitor centre for small personal items; large bags are best left in vehicles or with tour operators.
  • Free Wi-Fi is available in parts of the visitor centre and surrounding complex, but not inside the cave itself.
  • Staff are trained to assist visitors in case of emergencies, with first aid support available on-site during opening hours.
No wheelchair access symbol with red diagonal line.
  • The main cave route is largely accessible thanks to the underground train and wide, paved walking paths inside the cave.
  • Expect some walking and a small number of stairs, which may limit access for those with reduced mobility.
  • Wheelchair access is possible on parts of the tour, but full wheelchair access is not available for the entire route.
  • Lighting is low in some sections to protect the cave environment, which may be challenging for visitors with visual impairments.
  • Assistance animals are not permitted inside the cave due to environmental protection rules.
No-flash photography sign at SEA Life London.
  • Entry to Postojna Cave is only permitted as part of a guided tour at a scheduled time.
  • Touching cave formations, walls, or wildlife is strictly prohibited to protect the fragile environment.
  • Photography is allowed, but flash photography is discouraged inside the cave.
  • Eating, drinking, and smoking are not permitted inside the cave system.
  • Pets are not allowed inside the cave.
  • You must stay with your guide and follow marked paths at all times during the tour.
  • Wear comfortable walking shoes and warm clothing since there will be uneven surfaces and the cool temperature inside the cave.
Takeaway coffee being handed over at Café Kitsuné Palais Royal.
  • Briljant Restaurant & Bar: A casual, self-service restaurant near the cave entrance serving hot meals, local dishes, and quick bites. It’s ideal before or after your cave tour.
  • Restaurant in Hotel Jama: Located next to the cave park, this sit-down restaurant offers Slovenian and international cuisine in a relaxed setting, suitable for longer meals.
  • Cafés & snack bars: Several small cafés around the visitor centre serve coffee, pastries, sandwiches, and light snacks between tours.
  • Ice cream & refreshments: Seasonal kiosks near the entrance sell ice cream and cold drinks, perfect for a quick treat on warmer days.
Family enjoying view from resort hotel room with luggage nearby.
  • Hotel Jama: Located right next to the Postojna Cave Park, Hotel Jama is the most convenient place to stay, offering comfortable rooms and direct access to the cave complex. It is ideal for early tour slots or relaxed multi-day visits.
  • Postojna town accommodations: The nearby town of Postojna has a range of guesthouses, small hotels, and apartments, providing budget-friendly and family-friendly options just a short drive from the cave.
  • Staying in Ljubljana: You can even choose to stay in Ljubljana, about an hour away, and visit Postojna Cave on a day trip, combining the cave with other highlights like Predjama Castle or Lake Bled.
Woman browsing bracelets at a beach market stall with woven baskets.

The cave complex has official souvenir shops near the visitor centre where you can browse postcards, guidebooks, and locally made keepsakes inspired by the cave. What you’ll find:

  • Proteus-themed gifts: You’ll find educational items, plush toys, and souvenirs featuring the proteus (olm), the rare cave-dwelling amphibian that lives in Postojna Cave.
  • Local products: Some shops sell Slovenian specialties such as honey, liqueurs, and small crafts, making for easy, authentic gifts.
  • Practical essentials: The shops also carry cold-weather accessories and small travel necessities useful for the cool cave environment.

Before you go underground: smart tips for Postojna Cave

  • Dress for the cave, not the weather outside: The cave stays around 10°C year-round, so bring a warm layer even in summer.
  • Wear sturdy shoes: Walkways are paved but can be damp and slippery in places, so good grip matters.
  • Arrive early for your time slot: Guided tours run on a schedule, and late arrivals may not be accommodated.
  • Expect a train ride + walking: The visit includes an underground train and about 1–1.5 km of walking at a relaxed pace.
  • Keep bags light: Large backpacks can be uncomfortable inside the cave and are best left in your car or with your tour operator.
  • Photography is allowed, flashes aren’t your friend: Low light and no flash help protect the cave and get better photos anyway.
  • Combine smartly: If you’re pairing this with Predjama Castle, visit the cave first and the castle later in the day for better flow.

Frequently asked questions about Postojna Cave tickets & tours

You can choose between a Postojna Cave guided tour and several day trips from Ljubljana that combine the cave with other destinations like Predjama Castle, Lake Bled, or Piran.