Rainbow arches over Hukou Waterfall of Yellow river

A rainbow recently appeared over the renowned Hukou Waterfall in northwest China's Shaanxi Province, attracting many tourists. 　

Located on the border of Shanxi and Shaanxi provinces, Hukou Waterfall is the second-largest in China and the largest on the Yellow River. The width of the waterfall changes with seasonHourglass hotties. it is usually about 30 meters but increases to 50 meters during flood season.