These tours bundle Slovenia’s two most theatrical underground sights, and I’ve picked the ones that do both justice. An electric train carries you deep into Postojna Cave; nearby, Predjama Castle sits wedged into a cliff mouth, the largest cave castle in the world. Bring a layer, since the cave holds about 10 degrees Celsius year round.
Uncover the captivating wonders of Postojna Cave and Predjama Castle on this intriguing tour in Ljubljana - a journey that promises hidden gems and unforgettable experiences.
Most Popular★ 4.9“The guide was very informative and guided us where we can go, punctual and very polite. Both sites were splendid, not to be missed!”
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2,146 reviews6 hoursFrom $115by To do in Slovenia
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Discover Slovenia’s top natural and historical marvels with this guided tour of Postojna Cave and Predjama Castle, including skip-the-line tickets from Ljubljana.
★ 5.0“Magical! I was expecting a dragon to appear! The caves are amazing. Our guide Mica was very nice and helpful and told us lots of history and stories. Very enjoyable.”
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938 reviews6 hours (approx.)From $131.81by To do in Slovenia
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Curious about Slovenia's hidden gems? Join us on a journey through Lake Bled, Postojna Cave, and Predjama Castle for a day of enchantment and mystery.
★ 5.0“Nina was fantastic. An option to Lake Bled should include some free time up on Bled Castle, even if we prefer not to do the Castle tour. This would accommodate those who would prefer not to see the castle, but would like to see the…”
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879 reviews10 hours (approx.)From $151.16by Slovenia Explorer
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Kicking off from Ljubljana, embark on a journey to Lake Bled and Postojna Cave that promises unparalleled experiences - but what lies hidden within these Slovenian treasures?
★ 4.8“Everything was amazing on our trip. Special thanks to Lukas for making our trip even better.!!”
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694 reviews11.5 hoursFrom $173by To do in Slovenia
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Dive into Slovenia's captivating natural wonders and historic gems on this intimate day tour from Ljubljana, where adventure and culture intertwine in a spellbinding odyssey.
★ 4.8“Our tourist guide Kaarine was super good!”
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250 reviews10 hoursFrom $117by Slovenia Explorer
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Explore Slovenia’s underground marvels with this guided tour from Ljubljana, visiting Postojna Cave and Predjama Castle—perfect for history buffs and adventure seekers alike.
★ 4.9“Very quick and safe ride to two stunningly beautiful places. Very nice and knowledgeable guide/driver. I had a great time and would definitely recommend this tour.”
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247 reviews5.5 hoursFrom $81by Slovenian Wander
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Discover Slovenia's highlights with this full-day tour from Ljubljana, visiting Postojna Cave, Predjama Castle, and charming Piran—perfect for culture and nature lovers.
★ 5.0“David was highly knowledgeable and good command over English. He shared lot of details about Slovenian history and the places of visit. Postojna cave is unbelievable and not worth missing”
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244 reviews10 hoursFrom $128by Slovenian Wander
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Trek through Slovenia's enchanting landscapes to unravel the secrets of Postojna Cave, Predjama Castle, and Lake Bled, where surprises await at every turn.
★ 4.7“Thomas was an amazing guide. Really fun, friendly and informative. He was time efficient and told us loads of recommendations. His knowledge of Slovenia and its past was incredible.”
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220 reviews11.5 hoursFrom $169by To do in Slovenia
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Adventure into the depths of Postojna Cave and unravel the enigmatic stories of Predjama Castle, where mysteries and treasures await - but what lies beyond?
★ 4.8“Ines our guide was brilliant! She explained every detail and was very attentive. We talked a lot about the country and such a coincidence we are brazilian, and she had been in Brazil a few times and love the country”
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185 reviews5 hoursFrom $76by Govisitslovenia
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Trek through time and terrain on an enthralling small group tour to Postojna Cave and Predjama Castle in Ljubljana, where history and mystery converge.
★ 5.0“Karina was an excellet guide! 45 min drive to the caves and then its a 10 min drive to the castle. She gave as a brief history lesson with interesting facts about Slovenia and the castle and the caves. Very enjoyable tour. Had plenty time…”
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161 reviews5 hours 30 minutes (approx.)From $88.32by Gray Line Slovenia Explorer
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Bask in the enchanting beauty of Postojna Cave and Predjama Castle, where ancient secrets beckon you to unravel their mysteries...
★ 4.7“The tour and our guide (Rok) were fantastic. Perfect length of time at both places - the cave & castle. Rok provided lots of useful information and answered all our questions. He was very personable and friendly. The caves were exciting & fascinating and the…”
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137 reviews5.5 hoursFrom $124by ROUNDABOUT d.o.o. (Slovenia)
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Discover the captivating essence of Slovenia's natural beauty and historical charm on a day trip to Bled Lake with Postojna Cave & Castle - Small Group tour from Ljubljana, where surprises await at every turn.
★ 4.5“Great way to hear about the history of the area. Our guide was very knowledgeable. The scenery spectacular”
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127 reviews10 hours 30 minutes (approx.)From $193.50by Roundabout Travel
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Mesmerizing natural wonders and architectural marvels await in this captivating tour that takes you from Ljubljana to the heart of Slovenia's captivating landscapes.
★ 5.0“Our day trip went by smoothly and it was stress-free. Nate is punctual, professional, friendly and very knowledgeable. We really enjoyed his detailed historical narration he offered during the drive from one place to the other. We visited the castle early so we avoided crowds.…”
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110 reviewsFrom $124
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Wander through the enchanting Postojna Cave and Castle, where ancient mysteries and natural wonders converge, leaving you captivated and eager for more.
★ 4.5“We are both seniors. The initial walk in the cave after departing the train is quite strenuous for seniors, up a very steep grade. We believe Viator should mention this in its online description. The provided guide only stopped 3 times during the 1-1/2 hour…”
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101 reviews5 hours 30 minutes (approx.)From $128.19by Roundabout Travel
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Mesmerizing caves and captivating castles await on this tour that takes you beyond Ljubljana's charming streets into Slovenia's natural and historical wonders.
★ 4.9“Our tour guide, David, was so kind, friendly and knowledgeable. He was great from start to finish. We learnt more about where we were going and where we had been and he guided us all the way. The castle and caves were astonishing. David also…”
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94 reviewsFrom $70
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