In which country is the deepest cave in the world? How deep is it? How is it formed?

According to the British Daily Express and Daily Star reported on 25th, in order to shoot a deep cave that no one has ever explored in the world for the BBC science series Planet Earth, a brave explorer tied a camera to his head and a parachute to his back. He jumped from one of the largest caves in the world, reaching a depth of 65,438+.

This cave can accommodate the Empire State Building.

It is reported that the swallow cave in central Mexico is as deep as 1400 feet (about 426 meters) and is one of the deepest and largest caves in the world. Deep enough to hold the entire Empire State Building in New York (38 1 m). Yan Zidong also got the nickname "Big Hole". & ltbr/>； & ltbr/>； In order to shoot the science series Planet Earth, BBC explored many famous caves on the earth, including Swallow Cave in Mexico. & ltbr/>； & ltbr/>； Shockingly, in order to capture the mysterious scenery of Yanzi Cave, a TV explorer bravely jumped out of this dark cave with a parachute on his back. & ltbr/>； & ltbr/>； The "guano mountain" at the bottom of the cave is 2 meters high.

Explorers jumping into the swallow cave is just one of the amazing adventure series filmed by the BBC. The TV production team also spent a lot of time exploring many famous caves and underground tunnels from the United States to New Zealand.

Sometimes, in order to shoot the mysterious scenery in the cave, the photographer has to slide down the dark cave along the rope like a mountaineer. Hu Coday, the producer of Planet Earth, said: "The scenes we see never seem to belong to this world. We feel as if we have entered a huge refrigerator. "

In these mysterious caves, photographers photographed many rare creatures that humans have almost never seen, such as pink cave angelfish-only1000 people in the world have seen this creature before.

In a cave, explorers also found a strange Texas cave salamander, an albino creature with pointed cheeks and no eyes; In another cave, explorers also found that bat droppings attracted countless mantises, forming a 330-foot (about 100 meter) long "Mantis Mountain". The "Deer Cave" in Borneo is the largest underground waterway in the world, large enough for a large jet plane to pass through this cave, which is home to more than 5 million bats.