Parts of the northern Syrian province of Idlib are a U.N. World Heritage site, known for its ancient archaeological wonders. Walking along muddy, rocky ground covered in new grass and wild daffodils, we start to see remnants of Roman structures — the columns and doorways of dwellings, temples and churches that date back to the 1st century.
They're known as the Dead Cities, and they trace the transition from ancient pagan Rome to Christian Byzantium.