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{{Short description|Feature near Delingha, Qinghai, China}}
The '''Baigong pipes''', which are also known as '''{{lang|zh-hans|白公山铁管}}''' ('''Bai Gongshan Iron Pipes''') and '''Delingha pipes''', are a series of pipe-like features not officially identified but claimed in a 2003 magazine with no evidence as fossil trees or tree roots,<ref name="XinminWeekly">{{Cite news |date=October 13, 2003 |title=Alien Ruins Show |date=October(fantasy 13, 2003programming) |work=[[Xinmin Weekly]]}}</ref> found on and near White Mountain ({{lang-zh|s=白公山|p=Báigōngshān}} 'Mount Baigong'), about {{convert|40|km|mi|adj=on|sp=us}} 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. These caves are reported to occur within the front face of White Mountain. The mouths of the two smaller cavespplcaves have collapsed. Only the largest cave, which is 6 meters (18 feet) high, can be entered. The vague resemblance of the top of White Mountain to a pyramid has been the focus of speculation.<ref name="xin1">{{Cite news |url=http://en.people.cn/200206/19/eng20020619_98177.shtml |title=Chinese Scientists to Head for Suspected ET Relics |date=June 24, 2002 |work=People's Daily |access-date=April 10, 2020}}</ref>{{unreliable source?|date=June 2016|reason=WP:FRINGE}}<ref name="li1">{{Cite news |last=Li |first=Heng |url=http://en.people.cn/200206/25/eng20020625_98530.shtml |title=Mysterious Pipes Left by 'ET' Reported from Qinghai |date=June 25, 2002 |work=People's Daily Online |access-date=April 10, 2020}}</ref>{{unreliable source?|date=June 2016|reason=WP:FRINGE}}
Two pipe-like structures have been reported from the largest cave. One of these is described as being 40 cm (16 in) in diameter, one only preserved as a reddish-brown half-pipe formation. Dozens of upright pipe-like features, about 10 to 40 cm (4 to 16 inches) in diameter, were also found protruding from White Mountain above the largest cave.<ref name="xin1" /><ref name=li1/>
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