According to urban myths, a particular piece of land in Mexico is known as the Zone of Silence, because no radio signals can be received and compasses spin violently there.
There's an area in the Chihuahuan desert in northern Mexico where the radio signals don’t work, and compasses spin out of control when placed near stones on the ground. It’s called the Zone of Silence. It measures only 50 kilometers across, and it is located in the Mapimí Biosphere Reserve, a huge, mostly uninhabited expanse of almost 400,000 hectares, where the flat and desolate terrain is interspersed with lonely mountain outcrops.
The disruption is believed to be caused by subterranean deposits of magnetite, as well as debris from meteorites. The Zone’s overall effects (and even its location) are disputed, but there’s no doubt that the area, which sits on the borders of the Mexican states of Chihuahua, Durango, and Coahuila, has an abundance of celestial activity including, some say, visits from UFOs and extraterrestrials.