Located in the Liaohe River Delta, about 30 kilometers southwest of Panjin City, the Red Beach gets its name from red-colored sea weed that flourishes in saline-alkali soil. The weed starts growing during April or May, remains green during the summer, and turns flaming red in autumn. Only a small section of the beach is open to tourists. Source
Red Seabeach, China
The beach in Dawa in the Liaoning region of China, is famous for being, well, not beach colour, but red. It's not actually sand that gives it its colour, but the plant, Chenopodiaceae, which in autumn turns this saltmarsh-type land into a mind-bending sea of red.