Thereâ€™s an area in the Chihuahuan desert in northern Mexico where radio signals donâ€™t work, and compasses spin out of control when placed near stones on the ground. Itâ€™s called the Zone of Silence. It measures only 50 kilometers across, and it is located in the MapimÃ 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 name Zone of Silence was not given until 1966 when Pemex, the national oil company, sent an expedition to explore the area. The leader, Augusto Harry de la PeÃ±a, was frustrated by the problems he was having with his radio. He christened it the Zone of Silence.