The city of Dakar is a member of the Organization of World Heritage Cities, and contains several landmarks. One of the most notable is Deux Mamelles, twin hills located in Ouakam commune. The hills are the only high ground in the city, providing views of the entire  area and sweeping views of the city. The first hill is topped with Mamelles Lighthouse built in 1864. The second hill has the newly completed African Renaissance Monument built on top, which is considered the tallest statue in Africa.