found: Work cat.: Tony Landreau Collection on Turkish Carpet Weaving and Village Life, via WWW, 25 Feb. 2018slide DEN0001.jpg (name not given; depicts view of Derinkuyu)
found: GEOnet names server, viewed 25 Feb. 2018(Derinkuyu Yeraltı Şehri, Nevşehir İli, Turkey, ancient site)
found: Wikipedia, viewed 25 Feb. 2018:Derinkuyu underground city (Derinkuyu underground city (Cappadocian Greek: Μαλακοπή = Malakopi) is an ancient multi-level underground city in the Derinkuyu district in Nevşehir Province, Turkey)