Greek name (also Kanava = cellar) for the caves, as for example in large numbers on the Aegean archipelago Santorini
in the quite soft volcanic rock (Bimstuff) were created. There they are used as storerooms and also as wine cellars. The island is 1,500 v. From a huge volcano explosion. The rock glass, which has become foamy from siliceous and gas-rich lava, can be found in various forms as a loose pumice sand and pumice, as well as a solidified pumice. The more chamber and bubble rich tuff the soil has, the better the water retention and growing conditions for the vines.