Photo of the Day

These monumental stone pillars are among the incredible remains of the second century B.C. kingdom of Palmyra, Syria, an oasis and trade crossroads in the Syrian desert.

Roman forces sacked Palmyra in A.D. 273 after its powerful queen Zenobia challenged imperial rule. The city continued to be an important landmark after Roman conquest, hosting silk caravans from China, spice traders from India, and perfume merchants from Arabia.

(Photo shot on assignment for, but not published in, "Lawrence of Arabia: A Hero's Journey," January 1999, National Geographic magazine)

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