The rock-cut architecture of Petra, Jordan, stretches back to the 6th century B.C., yet it remained unknown to the Western world until 1812. Since then, the “rose-red city half as old as time,” as an 1845 poem described it, has become an enviable tourist destination -- described by Smithsonian Magazine as one of the top places to see before you die. Among Petra’s sites is the Al Deir monastery, pictured here.
The Ruins of Old Nor. Nor was once a successful and large city. No one knows what happened to cause its citizens to abandon it. Centuries later, a small village was built farther south and named after the mysterious city.