Classification of Artificial Cavities (2013)
Updating the Classification of Artificial Cavities (2025)
Typological Tree
The map of ancient underground aqueduct
Map of ancient hydraulic works
Map of Underground Heritage
Terms about artificial cavities in UIS Caver’s Multi -Lingual Dictionary
Symbol set UIS for Artificial Cavities survey
Dimitre Cliff Settlements, Kayseri – Turkey, photo Rainer Straub
