Ad-Dahna Desert passages which can be several kilometers long. Local Bedouin have always known these caves and some were used as water supplies. They were first systematically studied in the 1981, and later explored and reported by the Saudi Geological Survey. Ad-Dahna Desert The ad-Dahna Desert is the central division of the Arabian Desert. It is a corridor of sandy terrain forming a bow-like shape that connects an-Nafud desert in the north to Rub' al-Khali desert in the south. Its length is more than 1,000 km siding Twaik Mountains from the east and does not exceed 80 km in width. It is
Hami Desert to take their place, the country went out of cultivation and eventually became the barren desert it is now. During the Hun time, and probably into the Middle Age, the present desert was a lush steppe grassland able to support sustainable seasonal nomadic horse husbandry on a large scale. Hami Desert The Desert of Hami (, Uyhgur: Қумул Қумлуқи) is a section of the Gobi Desert in Xinjiang, China that occupies the space between the Tian Shan system on the north and the Nan-shan Mountains on the south, and is connected on the west with the Desert of Lop. "This