In an isolated desert region of Mexico near Durango, the air swallows sound. Its magnetic field is strong enough to interfere with satellite and radio signals, and because its natural radiation overrides the electromagnetic field of the microphone, broadcasting devices malfunction. No sound can be recorded here. Called la Zona del Silencio, just north of the Tropic of Cancer and south of the 30th parallel, this place shares a latitude—and a litany of legends—with Bermuda Triangle and the pyramids of Egypt.

– Christine Hume, Ransom Voice