Divining rod

The divining rod is the traditional tool for finding underground water: a forked branch, often of hazel, held by its two ends, which jerks up or down above a presumed source. Bent metal rods that cross or swing apart are also used today. Its use is documented in Europe since at least the sixteenth century, notably in mining prospection. Controlled tests have not confirmed its effectiveness, but the practice remains alive in rural areas.