phong nha ke national park / vietnam, 16/11/2017: woman with headlamp standing next to giant stalactites inside the hang tien cave

16112017 adventure asia bang beauty black caing cave cavern chamber dark exciting experience exploration explore giant hang headlamp inside jungle light mountain national next nha nhake outdoor oxalis park phong rainforest river rock scramble shadow southeast spectacular stalactite stalactites stalagmite standing thrill tien tour tourism tourist travel trip undergound vietnam wall water woman