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Postojna

Slovenia

About Postojna

Postojna is a small town in southwestern Slovenia best known for Postojna Cave, one of the most visited caves in the world. The cave system stretches over 24 kilometers and features an underground railway, massive stalactite chambers, and the famous olm — a blind cave salamander nicknamed the "baby dragon."

Beyond the caves, Postojna sits in the heart of the Karst region, a landscape of sinkholes, underground rivers, and dramatic geology. The nearby Predjama Castle, built into a cliff face, is one of the most extraordinary castles in Europe. Together they make Postojna a must-visit day trip or overnight stay.

Useful links:

Quick Tips

  • Currency: Euro (EUR). Cards accepted at the cave complex and most restaurants. Carry some cash for smaller venues.
  • Transport: Regular buses from Ljubljana (1 hour) and trains to Postojna station. The cave is a 20-minute walk from the center, or take a shuttle.
  • Tipping: Not expected, but rounding up is appreciated at restaurants.
  • Cave temperature: The cave is a constant 10°C year-round. Bring a jacket even in summer. Comfortable shoes are essential.
  • Combo ticket: Buy the combined Postojna Cave + Predjama Castle ticket to save money. The two sites are 10 km apart; a free shuttle connects them in summer.

Interesting Places to Visit

Postojna Cave (Postojnska jama)

The crown jewel of Slovenian tourism. A 90-minute guided tour includes a ride on the underground railway through spectacular stalactite formations. Don't miss the Vivarium where you can see the famous olm (Proteus anguinus), a blind cave-dwelling amphibian.

Predjama Castle (Predjamski grad)

A stunning Renaissance castle built into a 123-meter cliff face. The legend of the robber baron Erazem, who used a secret cave tunnel to resist a siege, makes this one of the most dramatic castles in Europe. 10 km from Postojna Cave.

Pivka Cave & Black Cave

Part of the Postojna cave system but far less visited. These wilder caves offer a more adventurous experience with underground rivers and dramatic chambers. Guided tours available from the main Postojna complex.

Planina Cave

The largest water cave in Slovenia, where two underground rivers merge. Known for its massive entrance and the confluence of the Rak and Pivka rivers inside the cave. A spectacular sight, especially after rain.

Notranjska Regional Park

A protected area encompassing the intermittent Lake Cerknica — one of Europe's largest disappearing lakes. In spring it fills with water; by late summer it drains into sinkholes. A fascinating karst phenomenon.

Škocjan Caves (UNESCO)

About 40 km from Postojna, these UNESCO-listed caves feature one of the largest underground chambers in the world. More rugged and less commercialized than Postojna, with a dramatic underground canyon. Absolutely worth the detour.

Snežnik Castle

A fairy-tale Renaissance castle surrounded by a lake, about 30 km south of Postojna. One of the best-preserved castles in Slovenia with original furnishings and a beautiful park. Far off the tourist trail.

When to Visit

Postojna's caves are open year-round, but the surrounding region offers different experiences by season:

🌸 Spring (March – May)

Excellent time to visit. Mild (10–20°C), fewer crowds than summer. Lake Cerknica fills with snowmelt — the best time to see this disappearing lake phenomenon.

  • Lake Cerknica at its fullest
  • Baby olms sometimes born in the cave vivarium
  • Great weather for hiking the Karst

☀️ Summer (June – August)

Warm (22–30°C) and busiest season. The cave's constant 10°C provides welcome relief from the heat. Book cave tours in advance to avoid long queues.

  • Erazem Medieval Tournament at Predjama (July)
  • Most frequent cave tour departures
  • Free shuttle between cave and castle

🍂 Autumn (September – November)

Cooling temperatures (5–18°C) and thinning crowds. Beautiful foliage in the surrounding forests. October is a sweet spot with good weather and minimal queues.

  • Fewer tourists, shorter queues
  • Beautiful autumn Karst landscapes
  • Mushroom and chestnut season

❄️ Winter (December – February)

Cold outside (−2 to 5°C), but the cave stays 10°C — warmer than outside! Quietest time to visit. The Christmas Concert inside Postojna Cave in December is a unique experience.

  • Living Nativity Scene in Postojna Cave (December)
  • Almost no queues
  • Affordable accommodation

Where to Eat (Affordable & Good)

Postojna is a small town, but the Karst region is known for hearty cuisine, cured meats, and excellent red wines:

Gostilna Požar$ – $$

Traditional Karst cuisine in a cozy setting. Try the jota (bean and sauerkraut soup), pork ribs, and local Teran red wine. Popular with locals, generous portions. Mains €7–13.

Restavracija Proteus$$

Named after the cave salamander, this restaurant near the cave entrance serves refined Slovenian cuisine. Good choice for a sit-down meal before or after the cave tour. Mains €10–18.

Gostilna Jama$

Simple, affordable restaurant near Postojna Cave. Straightforward Slovenian dishes — grilled meat, stews, and salads. A practical lunch stop without breaking the bank. Mains €6–10.

Pizzeria Minutka$

Reliable pizza and pasta spot in the town center. Family-friendly with quick service and budget-friendly prices. Pizzas from €5–9. Good for a casual meal.

Gostilna Štirna$ – $$

A gostilna a short drive from town serving excellent Karst specialties — pršut (dry-cured ham), štruklji, and game dishes. Known for its warm atmosphere and fair prices. Mains €8–14.

Erazem Restaurant (Predjama)$$ – $$$

Located next to Predjama Castle, this restaurant serves upscale Slovenian cuisine in a dramatic setting. The castle view from the terrace is unforgettable. Best for a special lunch. Mains €12–22.