Ruins in Syria

One of the world's best-preserved Roman amphitheaters is also one of the most unusual; it's made of black volcanic rock.

What is left of the pillar of Saint Simeon, the voluntary martyr who climbed the column to give his sermons, remaining perched there for thirty-seven years.

The Syrian headquarters of alleged hashish-smoking assassins.

Mysterious lost empire of the Silk Road.

Ruins of the Crusaders' headquarters.