It was at doline 2 of Son Doong cave, the largest in the world.
Photography in this humongous cave is not easy. So the tour operator has brought in high power lights to light up the scene for people to take photos. That's why almost every photos from the adventurers are all looks the same - unless from the specialized advertising shots.
I was lucky at the day when we were resting at camp 2 and the rain came. The rain created a veil of waterfall pouring down from the mountain above. I quickly grab my headlight and climb up to the big stalactites to create the sense of size in the image while leaving the camera on auto mode.
This has created a first unique shot above all others photos can be found in Son Doong cave.