The largest hot desert on Earth is the Sahara Desert. It spans multiple countries in North Africa, including Egypt, Sudan, and Algeria, covering an area of approximately 9.2 million square kilometers. The Sahara is characterized by its extreme temperatures, with hot days and cooler nights, along with minimal precipitation. This vast desert landscape is known for its sand dunes, rocky plateaus, and unique wildlife adapted to the harsh environment. The Sahara also plays a crucial role in the climatic patterns and ecology of the region.