Italy has more than 33,000 caves, covering an underground area almost a third of the size of Italy. Many of these caves are miles long and hundreds of yards deep, while many others are still unexplored, how exciting!
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Slovenia is a world-famous caving destination, with around 8,000 jamas, or caves, located in a country smaller than Vermont.
The karst landscape is the most widespread landscape type in Slovenia. Classical Karst covers the area between the Ljubljana Marsh (Ljubljansko barje) and the Bay of Trieste. There are around 6,000 known and explored caves in this area that cover approximately 6,400 km2 or 27% of the territory of Slovenia.
The Geological History of the Jenolan CavesScientists have determined, through the examination of the clay found in the caves, that the Jenolan subterranean system is around 340 million years old. This makes it the oldest known and dated open cave system in the world, and it is still being heavily researched today.
Son Doong is considered to be the largest cave in the world, based on volume and also the biggest cave in Vietnam, found by Ho Khanh – a Phong Nha jungle man in 1990.