Ksar Ouled Soltane, a fortified granary, Tataouine district, southern Tunisia. The ksar is spread out over two courtyards, each of which has a perimeter of multi-story vaulted granary cellars, or ghorfas.

Western sahara. Child and goat in polisario smara camp.

Western sahara. Women and children carrying gas bottles. Polisario smara camp.

Western sahara. Lorries loading water from main pipe at polisario central camp.

Dawn over the Erg Chebbi Saharan sand dunes near the town of Merzouga in eastern Morocco

from 35,000 feet in the air, the Sahara Desert looks more like the surface of Mars. Sahara Desert, Libya, North Africa

Great Pyramid of Giza (Pyramid of Khufu and Cheops), and Pyramid of Khafre (Pyramid of Chephren), Giza, Cairo, Egypt

Great Pyramid of Giza (Pyramid of Khufu and Cheops), and Pyramid of Khafre (Pyramid of Chephren), Giza, Cairo, Egypt

Saharan desert rivers, satellite image

Silhouette of three camels and their handler against the rising sun in the Saharan Desert in Morocco

Three passengers and their handler travel in the Saharan Desert in Morocco

Closeup of A Dromedary Camel preparing to walk through the sand in the Saharan Desert in Morocco

Two passengers and their handler travel in the Saharan Desert in Morocco

A beautiful model rides a camel through the Saharan Desert in Morocco

Silhouette of three camels and their handler against the rising sun in the Saharan Desert in Morocco

Closeup of A Dromedary Camel walking through the sand in the Saharan Desert in Morocco

Shadows of a group of travelers are seen in the sand as they walk through the Saharan Desert in Morocco

Silhouette of three camels and their handler against the rising sun in the Saharan Desert in Morocco

Closeup of A Dromedary Camel walking through the sand in the Saharan Desert in Morocco

Camels drink at a water trough at Abu Gadam in the Saharan Desert, Sudan. Think 25 gallons of water in 10 minutes.