One of the highlights of the campsite is an underground swimming pool that simulates the underground river system inside famous caves like Son Doong and Tu Lan.
"When I first saw the pool, I was a bit scared but imagining that I was in Son Doong Cave, I suddenly felt particularly inspired," Dung said.
The swimming pool also has three openings to catch sunlight, just like through a giant sinkhole inside Son Doong, the world's largest cave in Quang Binh.