The Sahara Desert, usually the Tassili and Ahaggar Mountains in southern Algeria, Tunisia or both, has been proposed as the actual site for Atlantis. When the French colonized North Africa they soon discovered a lost world existed in southern Algeria and that the ancient harbor of Carthage was an exact miniature of the capital of Atlantis as described by the Egyptian priests, novels such as Atlantide were popular in France, promoting the idea of Atlantis in the Sahara.