These are the first ever images taken of Er Wang Dong cave, a cave that is so large, it has its own weather system! A team of 15 cavers traveled to Chongquing province of China and were suprised by the size of the cave, estimated to measure 12½ acres, or around 12 football fields.
Check out the amazing images below.
The view from a small window in the wall of the vast Niubizi Tian Keng in the Er Wang Dong cave system, a cave so large it has its own weather system
An explorer ascends a rope hanging from the Niubizi Tian Keng. This photograph is one of the first-ever images taken inside the Er Wang Dong cave system
Man shines his light to help his buddy navigate his descent into the cave
American speleologist Erin Lynch struggles to pull her way across a raging torrent of white water, which is the main river in Quankou Dong. One of the explorers said they had to be aware of high water levels inside the caves, especially when it rained heavily on the surface
The spectacular beddings in the roof of Quankou. Photographer and caver Robbie Shone, from Manchester, was part of a team of 15 explorers on a month-long expedition who stumbled across the natural wonder
The underground camp in Sang Wang Dong is cosy and warm, according to the cavers. Hot food and drink recharge weary and tired explorers who sleep in either suspended hammocks or on roll mats on the floor, before venturing out into the vast surroundings
Large stalagmites at the foot of a giant ascending ramp to another level of development in San Wang Dong create a spectacle mid-way through a section of cave called Crusty Duvets
A giant calcite stalactite boss, dwarfs team member Matt Ryan as he looks up at the giant geological feature
Duncan Collis and Erin Lynch walk through a section of cave in San Wang Dong called The Sea of Tranquility. Here remains of old Nitrate mining cover the floor in forms of harths – pits and unwanted spoil. One team member said it reminded him of being in an abandoned slate quarrying North Wales in bad weather
An explorer scales the rope up a vertical section of cave known as a pit in Xinu Attic
Crystal clear pools and slow moving streams make it easier to explore Quankou Dongs main river passage in the huge network of caves that have not welcomed visitors in years
American speleologist Erin Lynch peers down over her shoulder into a giant void of cloud.The floor is over 240m below and although it cant be seen due to the thick cloud that lingers around her, the echo that reverberates several seconds later reminds her of the volume of empty space and her lofty location