00:00Petra wasn't built, it was carved.
00:02An entire city chiseled out of a rock.
00:05But how?
00:07The Nabataeans, who are ancient Arab traders, ruled this region 2,000 years ago.
00:12They didn't build Petra, they hollowed it out until all the rooms appeared.
00:16They carved top-down, ceiling before floor, so falling debris never wrecked finish work.
00:22They made precise borderlines first, and then they hollowed the middle.
00:25The chisel marks are still visible inside the monument today.
00:28Over 3,000 monuments inside, and there's still zero written record of how they actually organized it.
00:34Was this the ancient world's greatest construction project, or just the most patient one?
