An abused and forgotten metropolis, abandoned for centuries.

Hidden just under the waters around this Turkish island are the ruins of a once great city.

A Turkish ghost town abandoned in a population exchange with Greece.

The ornate miniature mansions were built for Istanbul's feathered residents.

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

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

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

A deadly ancient portal to the underworld.

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.

This ancient abbey now lies in majestic ruin behind a caravan park.

This Buddhist monastery once housed an image of Buddha containing a 19-carat diamond.

This beautiful medieval Serbian monastery is home to frescoes, peculiar sculptures, and historical curiosities.

The history of Mar Behnam Monastery is that of violence, intolerance, resiliency, and spirituality.

A network of ancient Egyptian tombs built into the cliff face along the Nile.

The city-sized home palace of one of ancient Egypt's most powerful rulers gives us a rare look into the lives of the epoch's rulers.

The largest known Ancient Egyptian obelisk.

This 7th-century monastery was sacked by Saladin.

An unfinished tomb carved into a giant boulder in the Arabian Desert.