San Wang Dong is a cave in Wulong Karst, China. It is 67,825 meters long.
Overview
San Wang Dong has been known to the locals for decades, although its exploration began around a decade ago. The first major scientific exploration of the cave was organized by the international Hong Meigui Cave Exploration Society.
San Wang Dong cave lies in close proximity to another huge cave, Er Wang Dong. San Wang Dong is located lower than Er Wang Dong and both caves might be connected. San Wang Dong has numerous large cave rooms and passages, many of which are almost intact.
References
San Wang Dong Wikipedia(Text) CC BY-SA