The Hoggar Mountains are a highland region in the central Sahara in southern Algeria, along the Tropic of Cancer. The mountains cover an area of approximately 550,000 km2.
Landscape of the Assekrem region in the Hoggar in Tamanrasset Province
An oasis in the Hoggar Mountains
Panorama of The Ahaggar mountains
Image: Asskrem Hoggar 2
The Sahara is a desert spanning across North Africa. With an area of 9,200,000 square kilometres (3,600,000 sq mi), it is the largest hot desert in the world and the third-largest desert overall, smaller only than the deserts of Antarctica and the northern Arctic.
The Sahara taken by Apollo 17 astronauts, 1972
A satellite image of the Sahara by NASA WorldWind
An oasis in the Ahaggar Mountains. Oases support some life forms in extremely arid deserts.
Sand dunes in the Algerian Sahara