Photo: Texture, Fangshan National Geopark, Nanjing, China, by cattan2011

Texture, Fangshan National Geopark, Nanjing, China, by cattan2011 (CC BY 2.0)

source https://chinadigitaltimes.net/2020/12/photo-texture-fangshan-national-geopark-nanjing-china-by-cattan2011/