A sixth-century Byzantine cistern hidden below a modern carpet store.

This museum was invented in a novel before being made real by the author.

A surprising and unconventional mosque hidden in the subsoil of Istanbul.

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

The most metal church of all time was built in record time because of an international, pious pissing contest.

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

The eclectic home of a leading Turkish architect is a gorgeous piece of eye candy.

Famously misunderstood wonder of the ancient world

Gargoyle head that brings good luck.

This crumbling medieval basilica once attracted pilgrims by the thousands to collect a miraculous dust that formed above the saint's tomb.

Seven early Christians were sealed into a cave where legend has it they slept unharmed for centuries.

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

Carvings in Turkey's Marble Road may have directed ancient Romans to a hidden brothel.

The alleged house of the Virgin Mary is tucked away in a park and nature preserve on Mt. Koressos in Turkey and is holy to both Catholics and Muslims alike.

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

A deadly ancient portal to the underworld.

Once described as the "Eagle's Nest," this ruined ancient city rests on a remote mountaintop.

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

This ancient subterranean megalopolis is known for the hot oil traps that were installed above each of its entrances.

Turkish adventurer antiques in the heart of the Grand Bazaar.

An Art Nouveau gem hides beneath the layers of city grime obscuring this once-magnificent building.

A marvel of Byzantine engineering under the streets of Istanbul.

Ancient serpentine sacrifice holder that has stood the test of time.

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