Located on a well-watered plateau surrounded by hills and mountains, in the geographic center of the country, Addis Ababa is one of the continent’s booming and fast-growing capital cities. Addis Ababa, the city which is nestled under the Entoto Mountains, is the world’s third-highest capital city and has both an African and international feel. Called to be the diplomatic capital of Africa, Addis Ababa has served as the headquarters of the Organization of African Unity (now African Union) since its inception in 1963.