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Local name: Rakov Škocjan
Cerknica, Slovenia
Karst & Inner Carniola
Rakov Škocjan is a karst valley where a cave roof collapsed and left two rock arches standing above the Rak stream, 42 and 37 meters high. When the water is low you can walk under the Big Natural Bridge, follow the dry channel and step into the mouth of Tkalca Cave. Protected since 1949, it was Slovenia's first landscape park, and it still has no gate, no ticket desk and no lighting. It pairs easily with Postojna Cave in a day: that one is ticketed, lit and guided, this one is free and self-guided.

Plan Your Visit

Highlights

Ramsar wetland of international importance
Natural bridges formed by cave collapse
Follow a river into the karst underground
Rare wildlife adapted to cave life
Naturally preserved cave — no lighting or paved paths
Marked trail through karst features
Cross a natural bridge high above the river
See a karst river emerge and sink again

Safety Notes

!Stay on marked paths
!Slippery stone surfaces possible
!Unprotected drops and cliff edges
!Water levels can rise quickly

Photo Tip

The strongest shot is the Big Natural Bridge from the streambed when the Rak is low, with the arch framing the channel above you. The Little Natural Bridge is better from below, looking up through the arch. Light reaches into the dolines mid-morning and late afternoon; at midday the deep shade against bright sky is hard to expose for.

Before You Go

!Protected area
!Respect nature protection rules
!Not suitable for limited mobility
!Guided tours available
!Can be busy in summer
!Seasonal access
!Free entry
!Check water levels before visiting
!Sturdy footwear recommended
!Gravel access road

Access & Parking

Detailed access info in Plan Your Visit ↑
The last few kilometers in are unsurfaced forest road, fine for an ordinary car in dry weather but slow. A road runs the length of the valley with small gravel parking areas near the main features, so you can drive between the two bridges rather than walk the whole loop. From each one the viewpoints are a short walk, but the descents to the arches themselves are steep, rocky and cable-assisted in places.

Interesting Facts

1
Slovenia’s first landscape park
Rakov Škocjan was placed under protection by republic decree in 1949, the first Slovenian landscape park. The push came from the karst scholar Pavel Kunaver and from Angela Piskernik, the first Slovenian professional nature conservationist. The much larger Notranjska Regional Park that now surrounds it followed only in 2002, so this one small valley carries more than seventy-five years of continuous protection.
2
The smaller bridge is the taller one
The two rock arches are named for their span rather than their height, which catches most first-time visitors out. The Little Natural Bridge, Mali naravni most, carries an arch 42 meters high, while the Big Natural Bridge, Veliki naravni most, measures 37 meters. Both are surviving fragments of the roof of a single cave system that once ran the length of the valley. Everything between them collapsed.
3
A river with a beginning and an end inside one valley
The Rak surfaces from the Zelška Caves at the eastern end of Rakov Škocjan, meanders across the flat clayey valley floor, then disappears underground again at Tkalca Cave in the west. Its water arrives from the Cerknica plain and from beneath the Javorniki hills, and once it has sunk it runs on to Planina Cave, where it meets the Pivka underground. Very few places let you stand at both the spring and the sinkhole of the same river in one afternoon.
4
Named after a church that is now a ruin
The valley takes its name from the church of St. Cantianus, whose Slovene form Šent Kancijan contracted over centuries into Škocjan. The building stood beside the Big Natural Bridge and enters the written record in 1526, in a court document about a tax raised for defence against Ottoman raids. The date 1616 is still legible on a window arch on the north side and is usually read as a rebuilding. Only low stone walls survive today.
5
Valvasor put the valley on the map
Janez Vajkard Valvasor included Rakov Škocjan in The Glory of the Duchy of Carniola in 1689, with an engraving titled S. Cantianvs showing the lower Rak and Big Natural Bridge as part of a small settled landscape, with two churches, a cemetery, a sexton’s house and two farm buildings. The buildings on the bridge stayed inhabited until the Josephine reforms around 1780. By the Franciscean cadastre of 1823, only the ruined church remained.
6
A wetland of international importance
Rakov Škocjan is protected under the Ramsar Convention as part of a site it shares with Lake Cerknica and Križna Cave. The designation recognizes the karst hydrology that binds the three together: water sinking on the Cerknica plain resurfaces here as the Rak before vanishing again toward Planina. The valley also lies inside the Natura 2000 network, and the wider protected area is one of the richest places for biodiversity in Slovenia.
7
Home to the first cave beetle ever described
The dark fissures and flooded passages beneath Rakov Škocjan shelter true cave specialists, and the best known of them is the narrow-necked blind cave beetle, the first cave-dwelling beetle species ever described by science. Animals like this have spent millions of years underground and have lost both their eyes and their pigment. Almost no visitor will ever see one, but they are a large part of why these caves are treated as scientifically important.
8
A named component of the Classical Karst nomination
Rakov Škocjan appears by name in Classical Karst, the entry Slovenia placed on the UNESCO World Heritage Tentative List in 2015, which lists the poljes of the Classical Karst with the Rakov Škocjan valley among its areas of outstanding universal value. Tentative-list status is a stage in the nomination process rather than an inscription, so the valley remains a candidate rather than a World Heritage Site — a distinction worth keeping straight here.
9
The same valley looks like two different places
Water level changes a visit here more than season or weather does. When the Rak is low the stream bed dries out, and you can walk beneath the Big Natural Bridge, follow the empty channel through the collapse doline and step into the mouth of Tkalca Cave. When the water is high, that same ground is a flooded pool and the arch has to be admired from above. Regular visitors deliberately come back at both extremes.
10
An easy trail with a hard middle
The operator’s educational trail runs 6 kilometers with 188 meters of ascent, takes about 3 hours and is rated Easy, with information boards explaining the karst springs, the collapse dolines, the two arches, the forest and the cultural remains along the Rak. That rating describes the route along the valley. The short descents to the bridges and the cave entrances are a different matter: steep, rocky and secured with fixed cables in places.
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Visitor Wisdom

Traveler Insights

Combined public visitor ratings from Google and Tripadvisor. Last verified August 2026.

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Quick Facts

Estimated visit time
3–4 h
Best season
Spring, Summer, Autumn
Walking difficulty
Moderate
Family friendly
Partly
Pet friendly
Yes
Entry Fee
Free with paid extras
Access type
Forest path
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