Psychoanalyst Carl Jung reported a paranormal experience after visiting this mosaic-lined Roman baptistry.

This 18th-century dissection theater's frescoes display a gorgeous tension between the terrestrial and esoteric.

An incredible mosaic-lined monument said to have held the remains of an ancient Roman empress.

This amazingly preserved Doric temple was abandoned before it was ever completed.

Also known as the Square Colosseum, this building is a prime example of fascist-era rationalist architecture.

The mountaintop inspiration for Umberto Eco's "The Name of the Rose."

A lavish 16th-century mansion filled with spectacular staircases, fantastic frescoes, and gorgeous gardens.

Every inch of this chapel is covered in craftsmanship from across the world.

This large, circular tomb is the final resting place of the first emperor of Rome.

The highest waterfall in Italy is only "turned on" five times a year.

This breathtaking monastery was established by Saint Benedict himself 1,500 years ago.

A cave in southern Italy adorned with thousand-year-old Biblical frescoes existed in obscurity until fairly recently.

Geometry and mystery come together in an epic show of octagonal masonry.

This precariously perched fortress was once ruled by a crow-worshipping baron.

Gods clash with machines in a power plant regenerated as a museum.

A volcanic old faithful, Stromboli has been erupting continuously for the last 2000 years.

This mosaic-lined medieval church was built by the world's first admiral and still holds mass in ancient Greek.

This real life asylum of horrors is now an abandoned ruin that hides the unbreakable code to one patient's insanity.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

Eco-village hidden in the foothills of the Alps that created a massive system of psychedelic underground temples.

Step back in time and witness the fall of Constantinople.

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

Rock carving created 1,300 years ago 75 feet off the ground.

Turkish adventurer antiques in the heart of the Grand Bazaar.