On Sept. 13, 2008, numerous strange holes were discovered on a 3-kilometer stretch of exposed riverbed in Liguang Mountain at Wangcun Town, Huangshan City, in southeast China's Anhui Province. The holes, of various shapes and depths, look like traditional Chinese wet rice grinding mortars. Experts forecast that the holes will turn out to be ancient ice mortars, uncommon in the south of China. If this is the case, the holes could have been formed between 120,000 and 700,000 years ago.