Deux Mamelles, Collines des Mamelles, or simply Mamelles are twin hills located in Ouakam, a suburban commune of Dakar, in the Cap-Vert peninsula, Senegal. These hills are of volcanic origin and they are the vestiges of a plateau from the early Quaternary. The highest hill is only 105 metres (344 ft) high, but they stand out in the landscape owing to the flat surroundings. The name of these breast-shaped hills comes from the French term “Mamelle”, a name commonly applied in the French-speaking parts of the world to a breast.