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

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

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

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.

A charming beach town in Turkey captures all the colors of the rainbow.

An underground network of massive stone arches and their skylit vaults support ruins of portico structures above.

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

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

A tiny park in the middle of some big power politics.

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

A fountain standing as a testament to a doomed alliance.

A marvel of Byzantine engineering under the streets of Istanbul.

Legend says if you stick your thumb in the hole and it gets wet, your wish will be granted.

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.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

A section of the long chain that blocked enemy ships from entering Constantinople.

1513 Turkish world map, full of European state secrets and snarky commentary.

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

This column celebrates Rome's victory over the Goths, and may be the oldest Roman monument in Istanbul.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

A gorgeous, Gaudí-esque stairway constructed in the city of Istanbul by a prominent Jewish family.

Taking the subway here means doing so over a bridge located in the middle of an estuary.

This historic hotel preserves many treasures from its heyday hosting passengers on the Orient Express.

It's believed that this small church was connected to the Hagia Sophia via a secret tunnel.