Senegambian stone circles
The Senegambian stone circles, also known as the Wassu stone circles, are groups of large stone circles found in the Gambia, north of Janjanbureh, and in central Senegal. These circles cover an area of 30,000 square kilometers (12,000 square miles). Sometimes, they are divided into two groups: the Wassu circles in the Gambia and the Sine-Saloum circles in Senegal.