On the right bank of the Ili River, northeast of Almaty, there is one unusual dune, it is so-called "Singing Barkhan" - this is another unique miracle of nature. As you walk, the sand from under your feet begins to slide down the steep slope, and from the depths of the dune, a rumble is heard, resembling the noise of a flying plane. The sandy mountains are over 120 m high and stretch for 4 km. No one knows for sure where this huge mountain of sand came from in the windswept steppe valley between the ridges of the Ulken-Kalkan Mountains. It is curious that the dune does not roam the plain, but has remained in place for several millennia. A pronounced dune ridge with several outstanding peaks allows ski lovers to make an exotic descent along the slopes of the mountains. The climate in this area is sharply continental. In summer, temperatures often rise above 40 degrees.