abstract:Taiji Cave () is a karst cave located on Shilong Mountain (石龙山) in Guangde County, Xuancheng City, Anhui Province, People's Republic of China, where the provinces of Jiangsu, Zhejiang and Anhui meet. Ming Dynasty writer and poet Feng Menglong described the cave as one of the "Four Absolutes Under Heaven" (天下四绝 Tīanxià Sìjué). It is also considered a primary "Place of Enlightenment" (道教道场 Dàojiào Dàochǎng) by Taoists, similar to the Bodhimanda of Buddhism. The 200 million-year old cave is divided into dry and wet layers representing the yin and yang of Chinese philosophy.
With ahistoryof 250 million years, Taiji Cave was created by the underground water'scontinuousscouringanddissolution of carbonates on account of the geologicalmovement.