Khongoriin Els sand dunes stretch for an extraordinary 100km and are 21 kilometers wide and high. The dunes lie on the northern part of the mountains of Sevree and Zuulun Mountain. Local people call that by Singing Dune because of the sound produced by masses of sand moving in the wind can be heard from afar. That is why the dunes have been given the name ‘The Singing Sands’ or ‘Duut Manhan’. Near the Hongor Gol at the northern edge of the sand dunes is an oasis.