Mystery of the desert: The lost cities of the Nigerien Sahara

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Mystery of the desert: The lost cities of the Nigerien Sahara

Mystery of the desert: The lost cities of the Nigerien Sahara A long trek across the Sahara desert of northeastern Niger brings visitors to one of the most astonishing and rewarding sights in the Sahel: fortified villages of salt and clay. Who built these cities? When? Why? Many questions have never been fully answered.