Although named a UNESCO World Heritage Site in 1979, the caves have not been accessible since 1963.
After opening them to the public after WWII, the presence of visitors and influx of light created a number of problems like the growth of lichen, crystals, microbes, and fungi, forcing a permanent closure to preserve the site
Every traveler, who visit the country of Italy, has to know few of its regions. This list will give you the essential pieces of information that you will need.