phong nha ke national park / vietnam, 15/11/2017: woman entering the hang tien cave in the phong nha ke national park in vietnam

15112017 adventure asia bang beauty black caing cave cavern chamber dark entering exciting experience exploration explore hang jungle light mountain national nha nhake outdoor oxalis park phong rainforest river rock scramble shadow southeast spectacular stalactite stalagmite thrill tien tour tourism tourist travel trip undergound vietnam wall water woman