4 Is The Magic Number
The pattern of 4 aligning with sculpting rock and a Lost Ancient City (like an Ancient Las Vegas) set off the match making alarms in my mind...
For good reason.
In such a survival challenging environment; ingenuity, innovation, and inspiration for cultural transformation grow from the rock like the persistent desert plants and wildlife.
Many speculate on the reason for the placement of the Lost City of Petra. I believe an oasis in the desert can only be sustained with the shading of the mountains as the sun rises and sets behind them. Add in the ability to create ceramic pipelines; the arid valley becomes a secret aquatic getaway.
Why do you think the City of Petra was founded?
Why do you think the City of Petra was lost?