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Cerknica Plain
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Cerknica Plain (Cerknisko polje) is a vast karst field in the Inner Carniola region of Slovenia, world-renowned for Lake Cerknica, the largest intermittent lake on Earth. The plain covers an area of about 38 square kilometers and is drained by a complex underground karst system. Depending on the season and rainfall, the basin fills with water to become a massive lake, which often completely disappears during summer, leaving behind fertile grasslands. This phenomenon was famously described in the 17th century by the scholar Valvasor. The area is part of the Notranjska Regional Park and is designated as a wetland of international importance under the Ramsar Convention. It provides a critical habitat for over 270 bird species and numerous rare plants. Geologically, the plain is bordered by limestone and dolomite ridges, while its floor consists of impermeable sediments. Local communities, like the town of Cerknica, have historically adapted their way of life to the dramatic seasonal shifts of the water.
- Location: Slovenia
- Top sights: Čela · Klejni vrh · Kuharca
- Nearby: Cerknica (5 km)
Best time to visit & climate
The most pleasant time to visit is Jun–Aug.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg °C | -1 | 0 | 4 | 9 | 14 | 18 | 20 | 20 | 15 | 10 | 5 | 0 |
| Rain mm | 60 | 73 | 71 | 73 | 96 | 88 | 83 | 94 | 118 | 104 | 109 | 85 |
📋 Practical info
Getting there
The extensive area of Cerknica Plain in Slovenia is typically easily accessible from neighboring country roads or smaller settlements, which serve as excellent starting points.
Best season
The best time to visit is generally between late spring and early autumn, as these months typically offer pleasant temperatures and more stable weather conditions for outdoor activities.
Terrain & paths
The terrain in this valley or lowland region is generally flatter and more manageable than in the high mountains, yet gives a fascinating variety of geological and botanical features.
What to bring
Visitors should definitely wear sturdy footwear and weather-appropriate clothing, as well as always carry sufficient drinking water, since the infrastructure in natural areas can vary considerably.
Parking
Parking facilities are usually found at designated spots in the surrounding communities or at central starting points for hikes along the edges of the respective natural area.
Safety
It is strongly recommended, for reasons of nature conservation and personal safety, to always stay on official paths and to exercise appropriate caution during uncertain weather conditions.
Time needed
Experience shows that a typical visit duration ranges from a few hours to an entire day, heavily depending on what specific explorations or extensive hikes are planned for the occasion.
Geography
Facts
- It contains the world's largest intermittent lake
- The plain covers an area of approximately 38 sq km
- Over 270 bird species have been recorded here
- Valvasor described the lake's mechanics in 1689
- The area is a designated Ramsar wetland site
- Water exits the plain through underground sinkholes
Explore nearby
Notable places around
Route planner — Car & Motorhome
Where do you start? We build the route here, with stops and country notes along the way.
Vehicle
Only stops with (optional):
© OpenStreetMap contributors · OpenRouteService
Sights in the town Cerknica Plain (5)
Razgledišče Čela
Viewpoint on Mount Čela looking out over the karst field.
Sights nearby
Frequently asked questions
What is Cerknisko polje?
It is a karst field (polje) famous for the intermittent Lake Cerknica.
When is the lake at its largest?
Mostly in spring and autumn after heavy rains or snowmelt.
Does the lake really disappear?
Yes, in summer the water drains through sinkholes in the ground, and the basin becomes a meadow.
What can you do there?
You can go birdwatching, cycling, or ice skating on the frozen lake in winter.
Is there a museum about the lake?
Yes, in the village of Dolenje Jezero, there is a museum with an interactive model of the lake.
Cerknica Plain: where is it located?
Cerknica Plain is located in Slovenia.
Cerknica Plain: what is there to see?
Highlights include Čela, Klejni vrh, Kuharca.
Cerknica Plain: when is the best time to visit?
The most pleasant time to visit is Jun, Aug.
Cerknica Plain: why is it worth visiting?
Cerknica Plain (Cerknisko polje) is a vast karst field in the Inner Carniola region of Slovenia, world-renowned for Lake Cerknica, the largest intermittent lake on Earth.
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