Roman ruins top white travertine terraces formed by ancient hot springs.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Elevated freight railway turned wildly successful urban park.

This famous city eluded concrete detection until the early 2000's.

A Lycian city of the dead carved into the hillside of Southern Turkey, complete with startlingly human touches.

The most visited, and possibly most controversial, museum in Germany.

This ancient city - home to nine civilizations - is soon to be buried under 200 feet of water.

Mysterious lost empire of the Silk Road.

Ruins of the Crusaders' headquarters.

A Turkish monastery tucked into a cliff wall.

Balanced on four stone pillars, this historic tower was the site of a tragic political assassination.

The Syrian headquarters of alleged hashish-smoking assassins.

Only a handful of these gorgeous historic waterwheels remain but even those are in danger from local unrest.

Ottoman-era houses lovingly preserved.

A sacred lake with thousands of sacred carp and a biblical history.

This hunter-gatherer architecture is believed to be the oldest religious complex known.

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.

Mausoleum and Holy Seat of Antiochus I of Commagene.

The largest Neolithic ruins in the world hide a notably clean prehistoric metropolis.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.