Al-Ḥarra

Al-Harrah is a field of dark volcanic rock beside Wadi Sirhan in northern Arabia. Basalt flows cover wide areas of the plateau, contrasting with the sedimentary rocks beneath and the lower ground of the valley. The stony surface is broken by dry channels and sparse vegetation, while Wadi Sirhan provides a passage between the oases of al-Jawf and the lands to the northwest.