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

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

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

An ancient church on a tiny island covered in stone bible stories has controversially been turned into a museum.

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

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

A Turkish monastery tucked into a cliff wall.

A meow-velous tribute to a beloved street cat, made famous on the internet.

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

Live a night as a Byzantine King, with a minibar and private jacuzzi.

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.

A huge boat-shaped hotel with a blood red pool and other oddities.

The crypts are so large they're basically their own underground church.

Beautiful public park off the beaten path and away from tourists.

Crumbling remnant of Rio's colonial past tucked behind Corcovado mountain in the neighborhood of Cosme Velho.

The design of the Palacio Salvo has been described as "a lighthouse on top of a building."

This beautiful fountain was sculpted by a female artist who was ahead of her time.

One family's mission to exemplify sustainability took on a whole new life as a surprisingly beautiful home.

A beautiful young girl said to have been buried alive in her coffin…