Slovenian Karst: caves and a cave castle
Ljubljana, the underground railway of Postojna, Predjama Castle and the Venetian port of Piran.
- Distance
- 124 km (77 mi)
- Driving
- 1 h 43 min
- Suggested days
- 2
- Stops
- 4
- Countries
- Slovenia
- Updated
- May 1, 2026
At a glance: 2-day road trip of about 124 km (77 mi) with 4 stops, from Ljubljana to Piran. About 1 h 43 min of driving in total.
More road trips in Slovenia
Route description
Leave Ljubljana, with its castle hill and dragon-guarded bridges over the Ljubljanica, south-west on the A1 motorway to Postojna. Slovenian motorways require an electronic vignette.
At Postojna Cave an electric train carries visitors deep into halls of stalactites, home of the blind olm. It is cool underground all year, so bring a warm layer.
Predjama Castle is a short drive away, built into the mouth of a cave halfway up a 123 m cliff. The limestone Karst plateau around it has small villages, stone walls and vineyards.
Continue to the coast and Piran, a Venetian port town with Tartini Square and narrow lanes on a small peninsula. The centre is closed to traffic, so use the car parks outside town and the shuttle bus.
Stop-by-stop itinerary
In driving order. Distances are estimates between consecutive stops.
- 1Start
Ljubljana
Slovenia - 248 km
Postojna Cave
NaturePostojna, SloveniaAn electric train runs deep into a cave system of stalactite halls, home of the blind olm.
- 39 km
Predjama Castle
HistoryPredjama, SloveniaA castle built into the mouth of a cave halfway up a 123 m cliff.
- 467 km
Piran
Slovenia
FAQs
How long is Slovenian Karst: caves and a cave castle?
2-day road trip of about 124 km (77 mi) with 4 stops, from Ljubljana to Piran. About 1 h 43 min of driving in total.
How many days do you need for Slovenian Karst: caves and a cave castle?
We suggest 2 days: about 1 h 43 min of driving, which leaves time for the stops.
Where does Slovenian Karst: caves and a cave castle start and end?
It starts in Ljubljana and ends in Piran.
Which countries does Slovenian Karst: caves and a cave castle pass through?
Slovenia.
