 Mont Sokbaro, widely cited as the highest point of Benin is part of the Atakora Mountains.To the north of the Togo Mountains, there is undulating savannah, creased by the broad, meandering valley of the Oti River, a tributary of the River Volta, which flows through Lake Volta and into the Gulf of Guinea in Ghana.Several tributaries to this river system flow from the northern side of the Togo Mountains.