Tourists visit Danxia landform at Binggou scenic area in China's Gansu

Tourists take photos of the Danxia landform at Binggou scenic area in Sunan County, northwest China's Gansu Province, Oct. 12, 2018. Danxia landform is a unique type of geomorphology formed from red-colored sandstones and characterized by steep cliffs. (Xinhua/Fan Peishen)