Sahara
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The Sahara is a desert spanning North Africa. With an area of 9,200,000 square kilometres, it is the largest hot desert in the world and the third-largest desert overall, smaller only than the deserts
The Sahara taken by Apollo 17 astronauts, 1972
A 2002 satellite image of the Sahara by NASA WorldWind
An oasis in the Ahaggar Mountains
Sand dunes in the Algerian Sahara
Sahel
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The Sahel region, or Sahelian acacia savanna, is a biogeographical region in Africa. It is the transition zone between the more humid Sudanian savannas to its south and the drier Sahara to the north.
Mud Mosque Bani Sahel Region Burkina Faso 02
Sahel Scene Dori Sahel Region Burkina Faso
The lush green of the Sahelian acacia savanna during the rainy summer season in Mali. Note the large baobab amongst the acacia.
Herders with livestock and azawakh dogs in the Sahel