Humans have discovered caves all over the world, and it is not known whether these underground corridor-like caves, which meander underground and intertwine with canine teeth, are the places where underground people operate. For example, "Agarta" is the name of a legendary underground corridor located in Mexico and has since been widely used to refer to the underworld. In March 1942, U.S. President Franklin D. Roosevelt received Mr. and Mrs. Davielam, who had returned from archaeology in Mexico. The couple claimed to have found "Agarta" and met the guards who were guarding the entrance. It was a chance encounter they had in the jungles of Chiapas, Mexico. While traversing the local forest, they encountered a group of blue-skinned Indians at the entrance of a cave. These Indians, who call themselves the Lacantons, are descendants of the Mayans who have lived in the jungle for generations, guarding the sacred sites of their tribes. The Rams tried to go in and have a look, but the people of La Canton sternly refused, and signaled that the archaeological team they were leading should leave immediately and not to go any further, because this holy place was a distant world leading to the underground, and it contained countless treasures that outsiders were not allowed to enter. The helpless archaeological team could only miss the major discovery and returned abruptly at the entrance of the "Agarta" promenade. Although the Rams did not enter the underground world, the famous German explorer and writer Erich von Daniken experienced a bizarre underground journey. By chance, he entered the tunnel and was stunned by the sight of the tunnel. It is a dense and huge tunnel that surpasses the wisdom of modern people. He believes that the tunnels were excavated with high-tech ultra-high-temperature drill bits and directional blasting of electron rays, as well as certain technologies that are not yet available to mankind. All in all, the current state of the art simply cannot reach the level of constructing this tunnel. The passage is wide and straight, and the roof is unusually flat and smooth. There is a hall of more than 20,000 square meters, and ventilation shafts appear at certain distances. The ventilation shafts are on average 1.8 to 3.1 metres long and 80 centimetres wide. There are also countless bizarre prehistoric artifacts in the tunnel, including the "Golden Book" mentioned in the ancient legends of many peoples. Von Däniken considered it the world's most ambitious project, and the world's largest and most difficult mystery to be solved. He took several photos of the tunnel, but declined to give more details. The secret entrance and exit of the Underground Kingdom, this is not the last record of "Agarta". During World War II, U.S. Army soldier Hiber was separated from his comrades during the battle against the Japanese invasion of Burma and was left behind in the forests of Burma. One day, he stumbles upon a cave hidden by a boulder. Heber ventured into the cave and was shocked to find that it was illuminated by artificial light as bright as day, as if it were a huge underground city. Heber was watching when he was suddenly caught, and he was locked up for four years, and then he looked for an opportunity to escape. According to him, there are seven tunnels leading to the surface in this underground kingdom, each with secret entrances and exits to other parts of the world. In 1946, the British scientist Wilkins concluded in his book "The Mystery of Ancient South America" that the underground corridors opened up and built by prehistoric civilizations were connected from end to end, and there were many branches, which could run through Europe, Asia, the United States, and Africa, and then concluded that there was and still is an "underground kingdom" in the interior of the earth. Since the end of World War II, many similar underground corridors have been discovered. Records of the underground world of Agarta have appeared in secret archives of various countries since World War II, including Peru, the Andes, Ecuador, Turkey and the Altai Mountains. In July 1960, a Peruvian expedition discovered an underground corridor beneath the Andes Mountains, 600 kilometers east of Lima. The 1,000-kilometre underground corridor leads to Chile and Colombia. However, in order to protect the tunnel and wait for the future when mankind has enough science and technology to develop it, the Peruvian government closed the entrance to the underground tunnel and guarded it strictly. The site was later declared a UNESCO World Heritage Site. Later, while exploring the Andes near Guatemala, the Spaniard Anthony Fintos discovered a 50-kilometre-long underground corridor. This promenade has pointed arches that lead from the ground all the way to Mexico. In August 1972, a British expedition also found an underground promenade in Mexico's Sierra Madre, which led to Guatemala. According to the British expedition, every dawn could be heard like a drumming sound coming from the underground corridor. In May 1981, the famous explorer Mauis entered the underground corridor through the entrance to a cave near Guayaquil, Ecuador. In the underground corridor, Mauli found traces of manual excavation, and the walls of the cave were leveled and painted. There are prehistoric civilization forces undergroundA new view of underground civilization is being recognized by more and more people: there is indeed some kind of civilization force underground, and the underground kingdom is a refuge paradise for prehistoric civilization forces. Judging from the level of craftsmanship and architectural style embodied in the underground corridors, these masterpieces are likely to have been written by the legendary Atlanteans. Legend has it that the Atlanteans possessed a level of technology that is unattainable by humans today. All indications indicate that in the heyday of the last earth civilization, the earthlings at that time had already mastered nuclear technology and were likely to apply nuclear technology to the military field. The power of nuclear war is staggering, and all traces of civilization on the surface of the earth have been completely erased. Only a few survivors, such as the Atlanteans, escaped the catastrophe by digging underground corridors beforehand. As a result of the nuclear catastrophe, the surface world was rendered uninhabitable by humans for a considerable period of time, so living underground became their only option. There is still a lot of speculation about the entrance to the Underground Kingdom, with the strong magnetic field in Antarctica, the black hole region in the Arctic, and the Bermuda Delta all being the gateway to another world. Many researchers also say that warm winds often blow from the North Pole, proving that there are huge caves there. In February 1947, Rear Admiral Baird led an expedition from the North Pole into the interior of the earth and discovered a huge UFO base, inhabited by high-tech "giants". On December 24, 1965, the "Baird Diary" was exposed, which recorded a retired US rear admiral's adventure with the underground civilization in 1947, which seems to explain the attitude of the underground civilization when it came into contact with General Richard Evelyn Byrd. They oppose the militarization of nuclear technology by terrestrial civilizations, because they have experienced first-hand the horrific consequences of the destruction of the world. In 1947, Baird wrote in his diary that he led an expedition from the North Pole into the interior of the earth, and to his astonishment, he saw a valley full of green trees and a stream flowing through it. This is the North Pole, a world ruled by ice and snow! He also discovered a huge UFO base and extinct plants and animals on the ground, and the base is also inhabited by high-tech "supermen". The mysterious people told him that this underground world was called "Ariani". Originally, they were reluctant to come into contact with people from the outside world, but since the U.S. military dropped two atomic bombs on Hiroshima, Japan, they realized that the weapons in the hands of people in the outside world were very likely to destroy the whole world, so they sent aircraft to negotiate with the superpowers on the ground, but they did not receive a positive response, and some of the aircraft were attacked by fighter jets. Those mysterious people predicted that if people used atomic weapons, the earthly world would most likely go down the path of self-destruction, and humanity would once again enter the Dark Ages. Immediately upon his return to the United States, Baird reported the adventure to the highest authorities. He wrote in his diary: "That land is in the North Pole, and that base is a great mystery. ”