A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

Architectureal fantasy quarter of Rome.

Cold war icon and onetime "hole" in the iron curtain.

The mark of the Devil's horns on a marble column in Milan.

This remote British Imperial telegraph relay outpost drove men insane.

A "miracle" that seems to produce more holy fistfights than holy revelations.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

Commonly acknowledged as the only public monument to the Devil himself.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Da Vinci's equestrian statue, 500 years in the making.

An ancient capital city that dates back 3,000 years and harbors many surprises.

100 year tradition of fist fights, marked by marble footsteps.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

This bridge was constructed from the rubble of the infamous Bastille.

The Pope’s secret escape route.

Single runway interrupted by a busy road that cuts across its middle.

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

See massive fossils that are over 200 million years old in northeastern Arizona.

Mountain where Jesus was first tempted by the Devil.