Xianren Bridge (simplified Chinese: 仙人桥; traditional Chinese: 仙人橋; pinyin: Xiānrén Qiáo; lit. 'Fairy Bridge') is a natural arch created by flowing water that has the world's longest recorded span. Carved of limestone karst, the formation bridges Buliu River in the northern Guangxi Zhuang Autonomous Region, China. Because of its remote location, accessible only by a three-hour rafting trip, it was not discovered until recently and remains relatively obscure. An expedition in October 2010 by the Natural Arch and Bridge Society first measured the bridge's span and found it to be 121.9 ± 4.6 m (400 ± 15 ft) in length.
- Brandt-Erichsen, David; Wilbur, Jay (2015-10-01). "A tour of the Big 19: Photos and information on the world's giant natural arches". naturalarches.org. Natural Arch and Bridge Society. Retrieved 2017-03-12.
- "Fairy Bridge". Natural Arch and Bridge Society. Retrieved 2017-03-12.
- Jett, Stephen C.China Diary, The Natural Arch and Bridge Society