Great Mystery About Son Doong Cave
Son Doong cave complex of Phong Nha - Ke Bang National Park, located in Son Trach, Bo Trach district, Quang Binh province, Vietnam. So far, it has always considered the largest natural cave in the world was discovered.
Son Doong Cave, situated in Quang Binh Province, which has a large fast-flowing underground river inside, was found by a local resident named Ho Khanh in 1991.
The cave became famous after a group of British scientists from the British Cave Research Association, led by Howard and Deb Limbert, conducted a survey in Phong Nha-Ke Bang, which was recognized as a UNESCO World Heritage Site in April 2009.
The cave's massive size dwarfs visitors.
Entering the cave requires navigating a sheer drop of more than 250 feet. Once inside, explorers were astonished to see light in the distance.
It turned out to be coming from holes in the ceiling created millions of years ago when huge limestone chunks fell to the cave's floor, leaving massive natural skylights. As centuries passed, plants from the forest took root.
Jungle plants inside Son Doong Cave.
It contains an underground jungle with trees up to 30m tall and a river flowing inside it, a distinct feature that sets the cave apart from caves elsewhere.
It was found inside it, a forest 400m above the ground, unique on the planet. Anyone that arrives at this forest are admired because it is an echo of the ancient heritage of the jungle left 400m below ground, the trunk itself evolved by not developing in diameter, which themselves high to form a new life with weak light.
Layers of unusually large rare cave pearls in Son Doong Cave.
300 million years fossils have been found inside Son Doong cave. It is also a jackpot of rare cave pearls. The pearls form over hundreds of years as water drips down, dries up and leaves layers of calcite crystals on grains of sand.
You won't want to consider visiting Son Doong unless you are an extremely fit and adventurous traveler. Just getting to the cave requires hours of wilderness hiking through heavy jungle foliage where there are no trails. Only one company, Oxalis Adventure Tours, has so far been authorized to take tourists inside Son Doong. The company cautions that the trips are suitable for "budding explorers, trekkers, and photographers with a thirst for the ultimate adventure." If you are game, the company is offering seven-day tours for groups of eight travelers in 2014 starting in February for $3000.