German photographer Carsten Peter's "Endless Cave" was shot in which country?

Shanshui cave, also translated into Chinese (Vietnamese: Hang S? n？ oòng/？ Mountain? Anong is a cave in Voyagabang National Park in Quang Binh province, Vietnam. The cave was discovered by local people in 199 1 In April 2009, the British Cave Research Association visited the cave and walked about 4.5 kilometers in the cave, but it stopped because of the flood. However, Han Song Cave has become the largest single cave corridor discovered so far in the world. [3]。