Merzouga dunes

Merzouga is a small village in southeastern Morocco, about 22 miles (35 km) southeast of Rissani, about 34 miles (55 km) from Erfoud.
The village is known for its proximity to Erg Chebbi, a Saharan erg, reason why it is included in all the itineraries of many tourists visiting Morocco. Merzouga has the largest natural underground body of water in Morocco.
Merzouga the local tourist center, is located near the edge of the dunes. A number of companies offer camel trips from Merzouga and into the desert, taking tourists on overnight trips several kilometres into the erg, which is enough to bring the village out of sight.
During the warmest part of the year, Moroccans come to Erg Chebbi to be buried neck-deep in the hot sand for a few minutes at a time. This is considered to be a treatment for rheumatism.
Tourists leave trails of footprints across the undulating sand dunes of the Sahara desert, the largest of its kind in Africa and the hottest in the world. The searing desert plains pictured - or ergs, as they are known technically - are those of Merzouga in Morocco, one of the 11 countries that the Sahara spreads across.