Every equinox this Maya pyramid puts on a spooky ancient light show.

Elaborate patterns adorn the city's disappearing traditional architecture.

A mesmerizing reservoir nestled at the heart of a pre-Islamic Yemeni village.

No one is sure if the world's fourth-largest diamond had been found in a rubbish heap or was pawned by Napoleon's mom.

A fountain standing as a testament to a doomed alliance.

The ancient latrines of the Greeks, in all their public glory.

The ancient abodes are a testament to human ingenuity amid harsh climates.

Mausoleum and Holy Seat of Antiochus I of Commagene.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

While not Turkey's deepest underground city, this subterranean redoubt is the largest.

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

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

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

A marvel of Byzantine engineering under the streets of Istanbul.

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

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

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

Ruins of the Crusaders' headquarters.

Mysterious lost empire of the Silk Road.

A bathhouse from the second Islamic Caliphate decorated with frescoes of constellations, pleasure gardens, and naked ladies.

The world's oldest map of the holy land gives us a fragmented glimpse of the layout of biblical nations.

Gladiators battle and chariots race daily in the ruins of a once-great Roman city.

A more chill but no less fascinating version of the famous ancient archeological site.

An ancient capital city that dates back 3,000 years and harbors many surprises.