5 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.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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