Tunisia (Arabic: تونس Tūnis), officially the Tunisian Republic (الجمهورية التونسية), is an Berber country located in North Africa. It is bordered by Algeria to the west and Libya to the southeast. It is the northernmost country on the African continent, and the smallest of the nations situated along the Atlas mountain range. Around forty percent of the country is composed of the Sahara desert, with much of the remainder consisting of particularly fertile soil and a 1300 km coastline. Both played a prominent role in ancient times, first with the famous Phoenician city of Carthage, and later as the Africa Province, which became known as the bread basket of the Roman Empire. Tunisia ranks high among Middle Eastern and African nations in reports released by The World Economic Forum. Tunisia is a country situated on the Mediterranean coast of North Africa, midway between the Atlantic Ocean and the Nile Valley. It is bordered by Algeria in the west and Libya in the south-east. An abrupt southern turn of its shoreline gives Tunisia two faces on the Mediterranean. Despite its relatively small size, Tunisia has great geographical and climactic diversity. The Dorsal, an extension of the Atlas Mountains, traverses Tunisia in a northeasterly direction from the Algerian border in the west to the Cape Bon peninsula. North of the Dorsal is the Tell, a region characterized by low, rolling hills and plains, although in the northwestern corner of Tunisia, the land reaches elevations of 1,050 meters. The Sahil is a plain along Tunisia's eastern Mediterranean coast famous for its olive monoculture. Inland from the Sahil, between the Dorsal and a range of hills south of Gafsa, are the Steppes. Much of the southern region is semi-arid and desert.