Desert near the oasis city of Al-'Ula, Saudi Arabia (@ Danita Delimont/Gallo Images/Getty Images)
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- It\s a hot, dry walk through this valley of shadows, but don\t fear…""There\s an oasis, right around the corner
- The incense trade route passed through here thousands of years ago.""Among the most-prized goods was a fabled aromatic tree resin
- Just 12 miles from here are ruins of a pre-Islamic settlement with ornate, monumental tombs carved directly into the sandstone.""Take a look at what archaeologists call the capital of monuments
- Winter monsoons can bring temporary rivulets through these cliffs.""But you\ll find no permanent rivers or lakes anywhere in this Arabian Peninsula kingdom
