The Sahara Desert is the largest hot desert in the world, and it is home to some unique sights. Dunes are large mounds of sand that are formed by the wind, and they are a common sight in the Sahara. SANDS are also a common sight, as the desert is made up of vast expanses of sand. Oases are areas of lush vegetation that are found in the desert, and they are often surrounded by sand. Camels are the most common form of transportation in the Sahara, and they are often seen carrying goods across the desert. MIRAGES are an optical illusion that can be seen in the desert, and they are caused by the refraction of light in the hot air.