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.