What made Petra's people abandon their city after surviving Roman occupation, massive earthquakes, and a flood? Over 2,000 years ago, Petra was a flourishing capital city in the Arabian Desert, but at some point, its inhabitants fled the majestic metropolis. Why they abandoned it has been one of the greatest mysteries of the ancient world. Now, archaeologists have uncovered incredible evidence that is rewriting the history of this desert city. Join host Adam Mastrelli as we examine how the Nabataeans transformed Petra into a thriving oasis and what led to its eventual demise.

A giant calendar? A cathedral to unknown gods? Or something more macabre? For centuries, archaeologists have argued over why and how Stonehenge was built. Now, a team of experts is attempting to reveal why this stunning and mysterious monument was created and why its remote location was chosen. Follow them as they comb a vast prehistoric settlement and perform forensic examinations in order to unlock the secrets of this 4,500-year-old prehistoric structure.