During the WWII the 400 km wildly ramified cave system has been partly destroyed. Nowadays 200 km of cave passages still exists on seven levels.
The caves are used as wine cellars and to breed champignons.
Four different types of mushrooms are breed here, lately even shitake. They used to harvest 60 tons a day, nowadays it is one ton a month. These numbers are hard to believe but that’s what we are told.
To me doesn’t really look very appetizing I prefer mushrooms from the forest.
In 1998 an artist cut an underground medieval city in the tuff somewhere in the cave labyrinth. He was working for three years on this project.