Togo is a small Sub-Saharan state, comprising a long strip of land in West Africa. Togo's geographic coordinates are a latitude of 8° north and a longitude of 1°10′ east. It is bordered by three countries: Benin to the east, with of border; Burkina Faso to the north, with of border; and Ghana, with of border. To the south Togo has of coastline along the Bight of Benin of the Gulf of Guinea in the North Atlantic Ocean. Togo stretches north from the Gulf and is only wide at the broadest point. In total, Togo has an area of , of which is land and is water. Togo is commonly divided into six geographic regions. In the south are low-lying sandy beaches. The coastal region is narrow and followed by tidal flats and shallow lagoons. There are also a number of lakes, the largest of which is Lake Togo. Land use Natural resources: phosphates, limestone, marble, arable land Land use: arable land: 44.2% permanent crops: 3.7% other: 52.1% (2011) Irrigated land: 73 km2 (2003) Total renewable water resources: 14.7 km2 Natural hazards: hot, dry Harmattan wind can reduce visibility in north during winter; periodic droughts. Physical geography The country consists primarily of two savanna plains regions separated by a southwest–northeast range of hills (the Chaîne du Togo). In the north lies the Ouatchi Plateau. This plateau is about wide and located at an altitude of above sea level. Terre de Barre is another name for this region, in use because of the reddish leached soil which is rich in iron. This southern area of Togo has been categorised by the World Wildlife Fund as part of the Guinean forest-savanna mosaic ecoregion. Northeast of the Ouatchi Plateau lies a tableland. At its highest this region is about above sea level. The area is drained by the Mono River and its tributaries, including the Ogou River. To the west and the southwest of the tableland lie the Togo Mountains. These mountains run across the central region of Togo, ranging from the southwest to the northeast. The mountain range reaches into Benin where it is known as the Atakora Mountains and Ghana where it is known as the Akwapim Hills. The highest mountain in Togo is Mount Agou with a height of . North of the Togo Mountains lies a sandstone plateau through which the Oti River flows. The vegetation is characterized by