Underground bases

Underground alien bases are a popular subject in UFO folklore, with some people claiming that extraterrestrial beings have established secret bases beneath the Earth’s surface. These bases are often said to be hidden in remote locations, and are used by aliens to conduct experiments, observe humanity, or plan for future invasions. However, there is no scientific evidence to support the existence of flying saucers or aliens, and most UFO sightings can be explained by natural phenomena or human error. The idea of underground alien bases is a product of popular culture and folklore, and is not based in scientific fact.