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Image of sand dunes in Rub' al Khali

Photo credit: Elipongo

Rub Al Khali is the largest contiguous sand desert in the world (erg),[1] encompassing most of the southern third of the Arabian Peninsula. The desert covers some 650,000 square kilometres (250,000 sq mi) (the area between long. 44°30′ −56°30′E., and lat. 16°30′ −23°00′N) including parts of Saudi Arabia, Oman, the United Arab Emirates, and Yemen.