The Carbera Cave in the breakaway republic of Abkhazia in Georgia was considered the deepest known cave in the world that contains more than two thousand meters of tunnels until the Vietnamese Hang Sun Dong Caves were discovered to become the largest caves in the world that contain the longest tunnels that were explored a few years ago.
The caves are located in the jungles of Vietnam amid the tall trees, and a British researcher and his wife discovered them during their expedition in 2009. While about a thousand visitors are allowed to enter the caves every year, as part of the measures set by the government to ensure the safety of the cave as a nature reserve. The journey inside it takes about four days and three nights. The area of the caves is estimated at more than 80 square meters, and has reached 4.5 kilometers to end at a group of amazing waterfalls that are believed to extend beyond the cave.
It was announced as the largest cave in the world in 2010, and contains a beautiful river that spans 2.5 kilometers inside a stone cave decorated with giant carved rocks, some of which are 70 meters long. The cave at its highest point inside can accommodate a 40-storey skyscraper, while Boeing’s widest track.
According to the National Geographic report, many previous British expeditions to explore the cave failed due to the difficult terrain and the thick forest that covers it, and the locals were aware of the existence of the cave but were afraid to enter it because of the intimidating sounds of waterfalls that can be heard clearly from the entrance to the cave.