Da Dong River Sink is an entrance of : Dadong River Sink - 大洞河落水洞 Cave name : Dadong River Sink - 大洞河落水洞 Other cave name : Pump Entrance Province, Prefecture, County : Guizhou 贵州省, Tongren Diqu 铜仁地区, Yanhe 沿河土家族自治县 Latitude North - Longitude East : 28.369513 - 108.404065 Elevation (a.s.l) m : 514 Geology :