Largest natural arch bridge
Carved from limestone karst, the formation crosses the Buliu River in northern Guangxi Zhuang Autonomous Region, China.
Due to its remote location, accessible only by a three-hour rafting trip, it was only discovered in 2009 and remains relatively little known.
An October 2010 expedition by the Natural Arches and Bridges Society measured the bridge's span for the first time and found it to be 121.9 ± 4.6 m (400 ± 15 ft) in length.
