Compare prices
EN
Stalagmites and stalactites inside a large limestone cave

Explore

Reka River Gorge & Dolines

See where the underground Reka River emerges into massive open-air collapse sinkholes.

Photo: tour listing on Viator

After exiting the main underground canyon, the trail leads through dramatic collapse sinkholes. Here, the Reka River meets the daylight before continuing its journey through the karst landscape.

This section allows you to appreciate the sheer scale of the cave system from the outside. It is also the point on the tour where park rules permit photography again.

View of a gorge with lush green forest and distant hills
Photo: tour listing on Viator
01

Big Collapse Doline (Velika dolina)

30 minutesPhotos allowed

This is a massive, 165-meter deep sinkhole where the underground river gorge emerges. It marks your exit from the dark, restricted cave interior. Photography is officially permitted again in this zone. Snap your dramatic cave exit photos here.

Lighthouse and historic buildings on a rocky breakwater near Piran
Photo: tour listing on Viator
02

Little Collapse Doline (Mala dolina)

20 minutesPath under bridge

This 120-meter deep doline is separated from Velika dolina by a natural limestone bridge. The trail winds directly through these exposed karst rock formations. Follow the path under the natural bridge for a clear view of the layered rock.

Visitors walking through a large, illuminated underground cave system
Photo: tour listing on Viator
03

Tominc Cave (Tominčeva jama)

15 minutesPrehistoric site

This is a smaller cave section located on the walking route back up to the surface. It is noted for yielding numerous prehistoric archaeological findings. Take a breather here to look at the history. It offers a quick rest before tackling the remaining ascent.

Book a Half-Day Tour

Underground river flowing through a massive cave with a lighted path
UNESCO's Skocjan Caves, Europe's largest underground canyon, Half Day Trip from Ljubljana4 h to 5 h 5.0 (8)from $170
half-day from ljubljanafrom $170 on Viator
Check dates