12 Cave Tours in Slovenian Istria to Build a Day Around

1.Škocjan UNESCO Caves and Piran Full-Day Trip

★★★★★★★★★★4.9 · 138 reviews · 10 hours · from $101Our pick

Travel from Ljubljana in a comfortable minivan for a two-hour tour of Škocjan Caves, a short stop at Socerb Castle, and 3.5 hours in Piran. Guides such as Nina, Tomas, Emil, and Tomaš add local stories, restaurant tips, and occasional extra stops. Cave walks include many steps and slippery sections.

“A really Lovely way to see the Mediterranean side of Slovenia. The Škocjan caves are A MUST. They are different to the Postojna caves so don’t miss out thinking that if you’ve seen one, you’ve seen them all.”

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2.Postojna Cave and Predjama Castle Tour

★★★★★★★★★★4.7 · 60 reviews · 5 hours · from $133

From Koper or Piran, ride an electric train through Postojna Cave, look for the cave-dwelling olm, then tour Predjama Castle, built into a 123-meter cliff. The five-hour trip includes transport, tickets, guide, pickup, and drop-off. English, German, and Italian departures are available, with private and small-group options.

“Amazing cave system and castle. Our guide was great. Definitely recommend.”

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3.Postojna Cave & Predjama Castle from Koper

★★★★★★★★★★4.5 · 46 reviews · 5 hours (approx.) · from $139

From Koper, your driver-guide takes you to Postojna Cave for an electric-train ride and guided walk through its 10°C underground halls. You then visit Predjama Castle, built into a 123-meter cliff. Pickup is available from hotels, the cruise terminal, bus and train stations. Guides such as Tina and Ernest have received especially warm praise.

“Cave and castle were beautiful. It's a bit of a drive too both and it felt like we were rushed at both sites. We still had enough time though to enjoy both sites. Caves were a bit chilly when on the train. Shorts and light jacket is more than enough if your from a cooler climate.”

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4.Postojna Cave & Photostop Predjama castle – Group Tour from Koper

★★★★★★★★★★5.0 · 35 reviews · 5 hours (approx.) · from $153Top rated

From Koper Cruise Terminal, ride an air-conditioned van to Postojna Cave, enter by electric train, and walk through its cool underground halls with a local guide. Your English-speaking escort, possibly Yuri, Mateja, Marina, or Neva, handles timing and transport. The tour ends with a 15-minute photo stop at Predjama Castle, not an interior visit.

“Both the cave and castle were wonderous experiences. Must sees. Chose my cruise because it would stop in Koper, Slovenia so that I could take this tour. The van was comfortable and the tour guides friendly. Both the cave and castle had self-guided options.”

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5.Group tour to Postojna Cave from Koper – with unique cave train

★★★★★★★★★★4.5 · 20 reviews · 5 hours (approx.) · from $105

Leave Koper’s cruise terminal by air-conditioned vehicle for Postojna Cave, where an electric train carries you through a 24-kilometre Karst system before a roughly one-kilometre walk through cool, sometimes slippery halls. You’ll also stop for photos at Predjama Castle. Guide Damien has earned praise for his patient, clear hosting.

“We enjoyed the cave tour. We were there when the crowds were lite. I've heard it can be very crowded during peak season. The walk inside is very steep at times and is about an hour long. Great picture opportunity. The castle tour was a disappointment that we did not go inside. But is was picture perfect from the outside”

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6.Postojna Cave & Predjama Castle – Shore Excursion from Koper

★★★★★★★★★★4.5 · 12 reviews · 5 hours (approx.) · from $142

From Koper, a driver-guide takes you to Predjama Castle, built into a 123-meter cliff, then Postojna Cave, where an electric train carries you through vast underground halls. Expect about five hours, pickup at your port or hotel, included admission, and a cave temperature of 10 °C. Guides may include Matt, Dejan, or Ernie.

“Koper Tours guide Matt was an excellent host for our cruise stop in Koper. From finding him as we disembarked (super easy) to the drive out to the cave and castle (good info on Slovenia history and culture), to a couple quick extra stops on the drive back because we were ahead of schedule. Thanks Matt and Koper Tours! You made our first time experience in Slovenia memorable.”

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7.Half-Day Caves and Castles Tour from Portorož

★★★★★★★★★★5.0 · 9 reviews · 5 hours · from $133

Travel from your Portorož hotel with a live English, German, or Italian guide to Postojna Cave and Predjama Castle. Ride the cave train, see the proteus, and explore a medieval fortress built into a 123-meter cliff. Guides such as Dean and Ernie add useful Slovenian history along the way.

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8.Lipica Stud Farm and Skocjan Caves from Koper

★★★★★★★★★★4.5 · 7 reviews · 6 hours (approx.) · from $134

From Koper, your English-speaking driver-guide takes you to Lipica Stud Farm and Škocjan Caves. See Lipizzan horses, visit the Lipikum Museum, cross a bridge above an underground river, and walk through Škocjan Regional Park. Pickup is available from hotels, stations, and Koper’s cruise terminal.

“Good tour. Well worth our time and definitely happy that we booked it. The caves are wonderful be prepared for lots of walking up and down wet, slopping paths and stairs with occasional low ceilings. The stud farm was an easy walk around the grounds and through the stables. Our driver said that he spoke only a little English, but seemed to understand everything we said. I would have liked more information about the area during the drive, but that did not take away much from the tour. The arrival process was well-organized and finding our driver was easy. After the tour, we returned back to the pier promptly.”

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9.Postojna Cave and Predjama Castle

★★★★★★★★★★4.4 · 5 reviews · from $129

Travel from Piran to Postojna Cave and Predjama Castle with a guide such as Mauritio, Dian, or Ernest. Ride an underground electric train, see the proteus, then tour a medieval castle built into a 123-meter cliff. English, German, and Italian tours are available.

“It was a great trip with a fantastic, very simpatico tour guide. My teenage son and I were picked up in Piran and during the tour to the caves he told us a lot of very interesting facts about Slovenia. Mauritio if youŕe reading this, kind regards to you from Graz! The caves were really amazing and the cave castle too! But you have to wear warm clothes when you go into the the caves.”

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10.Postojna Cave & Predjama Castle – Small Group Tour from Koper

★★★★★★★★★★4.5 · 5 reviews · 5 hours (approx.) · from $133

Travel from Koper by included round-trip transport with a driver-guide, then spend about two hours at Postojna Cave and two at Predjama Castle. Ride an electric train through Slovenia’s famous underground passages, see the proteus, and explore a cave castle tied to the legend of Erazem.

“There was a lot of stairs and dress warm for the cave experience, but it was awesome! This was a lovely trip!”

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11.Shore Excursion/Private – Postojna Cave and Ljubljana from Koper

★★★★★★★★★★5.0 · 4 reviews · 8 to 9 hours (approx.)

From Koper, your private guide takes you by air-conditioned van to chilly Postojna Cave and Ljubljana, Slovenia’s compact capital. Expect about eight to nine hours, a two-mile cave walk, and a guided city stroll covering the Franciscan Cathedral and Town Hall. Igor Mackovsek is one guide associated with this experience.

“My family and I took a cruise in May and had the opportunity to visit beautiful Slovenia. Our fantastic guide Igor started the tour by taking us to Ljubljana where he gave us a walking tour of the downtown area. On Fridays in the Spring, they have a Food Festival at lunchtime so we were able to sample some wonderful local cuisine and beers. Then it was on to the famous caves which were amazing – take a jacket because it’s a little chilly. Igor gave us great recommendations all along the way and plenty of time to explore and do a little shopping. If you are looking for a…”

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12.Half day tour to Postojna cave – Private tour from Koper

★★★★★★★★★★4.0 · 3 reviews · from $145

Start at 9:00 am with pickup in Koper, Trieste, or Piran, then ride an electric train through Postojna Cave and visit Predjama Castle. Your private vehicle and driver keep the day simple, though the cave visit joins a standard group tour. Maurizio has earned praise for his local stories and friendly style.

“If you are coming into Trieste on a cruise, I highly recommend this trip. We were whisked away from the ship to the beautiful country of Slovenia in just a few minutes. Our luggage was safely secured in the back while we toured and it waRead more”

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