An-Nafūd

An-Nafūd is a vast red-sand desert in northern Arabia, occupying an oval depression roughly 290 kilometres long and 225 kilometres wide. Sudden winds build broad crescent dunes and move sand across the basin; rain normally comes only once or twice a year. Around its rim, especially near the Hejaz mountains, low oases raise dates, barley, vegetables and fruit. These islands of cultivation make the surrounding roads possible.

Southeastward, the Dahna forms a long corridor of gravel plains and sand that links the Nafud with the Rub al Khali. Travellers seeking the wells and markets of the northern oases could skirt the deepest dunes while keeping to firm ground. Jubbah and Tayma made the desert edge part of a wider Arabian route system, joining the Red Sea approaches with the interior and the Persian Gulf.

The desert was not empty between journeys. Rock art and archaeological remains record seasonal human movement and long-distance exchange in the arid interior. Camel caravans reduced the risks of crossing by carrying water, fodder and trade goods together. The Nafud therefore remained both a barrier and a corridor: an expanse of shifting sand that separated settled districts, yet directed those who knew its wells toward the oases on its margins.