chongqing china, three natural bridges,wulong ancient natural bridge scenic area,wulong national park, famous valley in china

angle asia asian bridges canyon cave china chinese chongqing day daylight edge ewide famous furong gate geology green hall heritage history lake landmark landscape lime limestone mountain mountainside national natural nature park penthouse rainbow river rock sightseeing stalagmite stone sun sunny three tianlong tienfu tourism tourists travel tree unesco valley village visitors water waterfall world wulong