Cross Cave
Archaeological Site Karst cave complex featuring underground river and formations
Cross Cave (Križna jama) near Cerknica contains underground lakes, stalactite chambers and a short boat trip; visitors come for guided tours and karst hydrology.
Cross Cave (Križna jama) is a karst show cave in the Municipality of Cerknica in southwestern Slovenia known for its network of underground lakes and chambers. It is one of Slovenia’s notable subterranean systems and is open to the public by guided tour.
Visitors encounter a sequence of chambers connected by water-filled passages; boat sections form part of the visitor route and allow access to inner lake areas. The cave is also important for subterranean biodiversity and speleological research, with several troglobitic species recorded in its waters and sediments.
The cave lies in the karst landscape of Inner Carniola, near local settlements in the Municipality of Cerknica. It is accessed from regional roads and is part of the broader karst system of southwest Slovenia.
- Visitor access: Guided boat trips are a feature of public visits, allowing access to interior lake passages and cave chambers.
What to See #
- Underground lakes: A series of subterranean lakes and waterways accessed by guided visits, notable for clear water and underground passages.
- Cave fauna and conservation: Habitat for specialized cave fauna and targets for speleological and biological study, with portions of the cave system set aside for conservation.
How to Get to Cross Cave #
Cross Cave is near Cerknica in Inner Carniola. From Ljubljana, drive southwest on the A1 and follow local roads toward Cerknica (approx. 1-1.5 hours). Local buses serve Cerknica; from there a short taxi or local transport is required to reach the cave entrance.
Tips for Visiting Cross Cave #
- Tours inside Cross Cave are small and guided-book with the Karst Research Institute or local operators in advance.
- Bring waterproof footwear; some passages involve short, damp walks and low bridges.
- Photography may be restricted inside certain caverns to protect sensitive features.
Best Time to Visit Cross Cave #
Visit in late spring through early autumn for the best access and guided tour availability.
Weather & Climate near Cross Cave #
Cross Cave's climate is classified as Oceanic - Oceanic climate with mild summers (peaking in August) and freezing winters (coldest in January). Temperatures range from -4°C to 25°C. Abundant rainfall (1690 mm/year), wettest in November.
January
January is the coldest month with highs of 3°C and lows of -4°C. Significant rainfall (111 mm) and mostly overcast skies.
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February
February is cold with highs of 5°C and lows of -3°C. Regular rainfall (97 mm) and mostly overcast skies.
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March
March is cold with highs of 8°C and lows of -1°C. Significant rainfall (125 mm) and partly cloudy skies.
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April
April is cold with highs of 12°C and lows of 3°C. Significant rainfall (144 mm) and partly cloudy skies.
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May
May is cool with highs of 17°C and lows of 7°C. Significant rainfall (129 mm) and partly cloudy skies.
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June
June is cool with highs of 21°C and lows of 10°C. Significant rainfall (164 mm) and partly cloudy skies.
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July
July is cool with highs of 24°C and lows of 12°C. Significant rainfall (117 mm).
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August
August is the warmest month with highs of 25°C and lows of 12°C. Significant rainfall (129 mm).
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September
September is cool with highs of 20°C and lows of 9°C. Significant rainfall (154 mm) and partly cloudy skies.
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October
October is cool with highs of 15°C and lows of 6°C. Significant rainfall (175 mm) and partly cloudy skies.
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November
November is cold with highs of 9°C and lows of 2°C. The wettest month with heavy rain (186 mm) and mostly overcast skies.
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December
December is cold with highs of 4°C and lows of -2°C. Significant rainfall (159 mm) and mostly overcast skies.
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