National Geographic History on Instagram: "While documenting cave societies, Nat Geo Explorer @tamaramerino_photography captured this footage of the cliffs that shelter Petra. Carved over 2,000 years ago, it was once a thriving trading hub at the heart of the Nabataean empire. Hewn from sandstone cliffs, its most iconic structure, the Treasury, is part of an expansive city sculpted into the desert rock. Though the Jordanian government relocated many Bedouin families in the 1980s to preserve the