Don't look down!

Climbers explore the murky abyss of 3,100ft deep underground shaft in China, I must admit I really do not like the thought of going deep underground, but I guess some ones got to do it! This rocky chasm in China is one of the world's deepest underground shafts. It stretches down for an astonishing 3,100ft, or 1,026 metres. An international team of cave explorers who discovered the cave, near the village of Tian Xing, are seen descending into the abyss.

Though unimaginably deep, the Chinese caves are actually dwarfed by others across the globe. The world's deepest cave is Krubera in Georgia, which is 6,822ft deep (2,080 metres), followed by Lamprechtsofen in Austria (5,354ft or 1,631 metres) and Gouffre Mirolda in France (5,335ft or 1,626 metres). As an interesting comparison, the world's tallest peak, Mount Everest, is 29,029ft (8,848 metres) high.

Photographer Robert Shone spent two months documenting the team's underground discoveries,

and this is at the bottom,