A closer look
The majestic rock-cut city of Petra wasn't just an architectural marvel; it was a masterful hydro-engineering scam that allowed the Nabataeans to dominate the incense trade route. Instead of dying of thirst in the arid Jordanian desert, they built an invisible, city-wide plumbing system consisting of hidden dams, terracotta pipes, and subterranean cisterns. They expertly trapped the violent, deadly flash floods that periodically swept through the canyons and stored millions of gallons of fresh water underground, creating an artificial desert oasis that charged passing caravans absolutely exorbitant prices for a drink.
