Ad-Dahnā' Corridor

Near Rumah the red sands of ad-Dahna meet the rocky country of al-Armah. The dunes form long ridges separated by lower ground, stretching across the route between Najd and eastern Arabia. Travellers drew water at the wells of Rumah before entering the sands or after emerging from them, while rain-fed hollows in the surrounding country provided grazing in favourable seasons.