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Another unique wonder of nature is the Singing Dunes, 182-km northeast of Almaty, on the right bank of the Ili river.
In dry weather this sand dune emits a sound like an organ playing. The Singing Dunes make an unforgettable impression. The scarcely perceptible movement of sand sliding down the slope causes the humming and vibration.
The friction caused by the movement of dry grains of sand, combined with the dry air, electrifies them, causing the vibration.
Because of the surrounding favorable resonant conditions, powerful sound waves are produced which bouncing off the solid ground also cause the dune to vibrate. The sound can be heard from several kilometers away.
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