RIYADH, Saudi Arabia — Much of the world knows Petra, the ancient ruin in modern-day Jordan that is celebrated in poetry as "the rose-red city, 'half as old as time,'" and which provided the climactic backdrop for "Indiana Jones and the Last Crusade."
But far fewer know Madain Saleh, a similarly spectacular treasure built by the same civilization, the Nabateans.
That's because it's in Saudi Arabia, where conservatives are deeply hostile to pagan, Jewish and Christian sites that predate the founding of Islam in the 7th century.
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