Morocco is located in the Maghreb region of North Africa, uniquely possessing coastlines on both the Atlantic Ocean and the Mediterranean Sea. Rabat is the capital, while Casablanca is the largest city and main port. The country's geography is dominated by the Atlas Mountains, which run through the center and south, and the Rif Mountains in the north. These ranges separate the fertile coastal plains from the harsh Sahara Desert to the east. Morocco is just 14 kilometers away from Europe across the Strait of Gibraltar. Its landscape includes the vast dunes of Erg Chebbi and the lush Draa Valley. The climate is Mediterranean in the north and arid in the south. Morocco is a major exporter of phosphates and has a growing tourism industry centered around its historic 'Imperial Cities' like Marrakesh and Fez. It is also the only African country that is currently a member of the African Union and claims the territory of Western Sahara.