24°41′16″N 106°48′00″E / 24.687723°N 106.799984°E / 24.687723; 106.799984

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.^[1] 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 2009^[2] 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.^[3][4]