Sahara is with a size of 8.6 million km², the world's largest desert, covering large parts of North Africa. Its maximum length is 4,800 km, running from west to east, and up to 1,200 km from north to south. Sahara is covering Mauritania, Morocco, Algeria, Tunisia, Libya, Egypt, Sudan, Chad, Niger and Mali. Sahara is bordered in the north by the Atlas Mountains and the Mediterranean Sea and in the west by the Atlantic Sea. In the south the desert zone go as far south as 16º northern latitude while it is bordered by the Nile in the east, even if the desert continues to the east of the river until it reaches the Red Sea.

2.5 million people live in Sahara, most of these in Mauritania, Morocco and Algeria. Dominant groups of people are Sahrawis, Tuareg and Negroids. The largest city is Nouakchott, Mauritania's capital. Other important cities are Tamanrasset, Algeria and Ghat, Libya. Sahara is very dry but there is an annual rainfall on most regions, but this is just a couple of millimetres.

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