The Liwa Desert is part of the Empty Quarter – the largest, and most likely the hottest, sand desert in the world. Although smaller than the Sahara Desert, the Empty Quarter covers 250,00 square miles across four countries: Saudi Arabia, Oman, the United Arab Emirates, and Yemen. The sand of the Empty Quarter is soft, fine, multicolored hues of khaki and orange, and it rolls in windswept dunes hundreds of feet high as far as the eye can see. Saw the sun rise this morning and went into the desert in a 4×4. Beautiful.