Photographer Urs Zihlmann has a 5-day trip in Son Doong, the largest cave in the world located in Quang Binh.
Great photos posted in the Daily Mail let readers see the world's largest cave in Vietnam.
With mysterious green light in a beautiful space like fairy, Son Doong cave is like another world.In the photo, the tents were set up for guests to spend the night.
Tourists admire this spectacular cave.To get here, they had to walk half a day, through the beautiful forest full of butterflies.
Photographer Urs Zihlmann took these photos during a 5-day trip to explore Son Doong Cave in Phong Nha - Ke Bang National Park, Quang Binh, Central Vietnam.
Each year, only about 450 visitors are allowed to enter the cave under the guidance of experts.This ensures a sustainable future for the cave.
Tourists go through huge, dark and slippery caves.Zihlmann said that inside the cave was like "not on this earth".
Compared to the huge size of the cave, the discoverers looked small.Zihlmann joined this wonderful trip at the end of April.
To get down to the cave, Zihlmann had to cross the 80 m high cliff with ropes and guards.
