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Bettany visits the remarkable ancient site of Hegra, in Saudi Arabia, where Nabataean human remains were recently found buried in stunning rock-cut tombs, and immerses herself in the nomadic lifestyle

Tracking ancient trade routes, Bettany discovers the Nabataean monopoly on prized incense, and joins underwater archaeologists gaining breathtaking access to a submerged temple in the Bay of Naples

On the final leg of her quest, Bettany visits the spectacular Nabataean city of Petra and takes to the skies with the Jordanian Air Force to explore newly discovered Roman camps that yield vital clues