Baigong pipes
The Baigong pipes, which are also known as 白公山铁管 (BaiGongShan Iron Pipes) and Delingha pipes, are a series of pipe-like features found on and near White Mountain (Chinese: 白公山; pinyin: Báigōngshān 'Mount Baigong'), about 40 kilometers (25 mi) southwest of the city of Delingha, in the Haixi Mongol and Tibetan Autonomous Prefecture, Qinghai Province, China. == White Mountain (白公山) == Some of the Baigong pipes are reported to be associated with three caves in White Mountain.