Khongor Sand dunes

Khongor Sand dunes also called Duut Mankhan is popularly known as the "Singing Sands". It lies within the Gobi Gurvansaikhan National Park in Mongolia. The sand dunes extend to over 965 square kilometres. The dunes extending up to the foot of the high Altai Mountains range, lie about 180 kilometres (110 mi) from Dalanzadgad. It is at a distance of 130 kilometres (81 mi) along the desert tracks to Bogd in Uvurkhangai in the north, and 215 kilometres (134 mi) to Bayanlig on the northwest in Bayankhongor.