The intricate geometry inside this Baroque-style dome was designed to create "terror of the human soul."

The mysterious “eyes of the Devil” dot a street in the occult center of Italy.

When this funny little building went up in the 19th century, most people thought it would simply fall over.

One of the oldest and most significant collections of Ancient Egyptian archeology outside of Egypt.

See every month of the year personified at this opulent Turinese fountain.

A portrayal of two lamps embraced and in love.

This sinister Baroque entryway could lead you to a terrible fate.

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

Small on the outside, big on the inside, this church is an astonishing act of visual deception.

The attic of a four-century-old canal house hides a clandestine church.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

This impressive collection of rare books on ancient mysticism inspired author Dan Brown.

Life-sized bronze statues of fictional puppet characters.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

No one knows the origin of this creepy little stone man with an oversized phallus.

Baroque celebration of the end of the Great Plague of Vienna.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

Macabre astrological automaton clock dating to the late 1400s.

Grotto replete with mystical designs laid out in glued shell mosaics.

A piece of stonework relief commemorates the site where the Devil's rage, and odd apparel, destroyed a house.

The bronzed skull of a beheaded traitor was affixed to the city gate in the 17th century.

A historic arboretum and non-conformist, non-denominational park cemetery.

Chelsea's soldiers were given strict orders when crossing this historic bridge.

The last four extravagant street signs of London's historic banking street.