La Zona Del Silencio, or the Zone of Silence, is a patch of desert near the Bolson de Mapimi in Mexico, in a place known as the Trino Vertex.
The first incident here occurred in the 1930’s when a pilot by the name of Francisco Sarabia was flying over the area and claimed his instruments went wild and his radio stopped working. Later, in the 1970’s, attention was drawn to the area when a faulty American missile was fired from the White Sands Missile Base in New Mexico and crashed—or perhaps was pulled—into the region. The Mexican government allowed U.S. Air Force officials to investigate the crash at the site, which is when the cause became apparent. It was discovered that no signals of any sort are able to penetrate the area—including radio and satellite signals—due to local magnetic fields that create a dark zone, thus attributing to the popular name of the site.