An untouched ancient city in Saudi Arabia now open to visitors.

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Hegra, an Ancient City in Saudi Arabia Untouched for Millennia, Makes Its Public Debut

The archaeological site, now open to tourists, offers clues about the mysterious empire that built it and its more famous sister city of Petra in Jordan

Once a thriving international trade hub, the archeological site of Hegra (also known as Mada’in Saleh) has been left practically undisturbed for almost 2,000 years. (Eric Lafforgue / Art in All of Us / Corbis via Getty Images)

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