The Mapimí Silent Zone (Spanish: La Zona del Silencio) is the popular name for a desert patch near the Bolsón de Mapimí in Durango, Mexico, overlapping the Mapimí Biosphere Reserve. It is the subject of an urban myth that claims it is an area where radio signals and any type of communications cannot be received. However, communications equipment tends to work properly in the zone. Guides assert that the zone moves around; as a result locals are highly skeptical of the zone's existence.