The remains of the left arm of the levitating philosopher-saint are kept in a 13th-century Neapolitan basilica.

Richard Luke Concanen never set foot on American soil.

The sacristy of this church contains remains and relics of members of the Aragonese royal family.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

Every day is like Christmas on this street where the traditional Neapolitan nativity scene comes to life.

An unusual "skull with ears" sits in the crypt of this small church tucked away at the end of a narrow alley.

The tallest statue in Italy is also one of the world's tallest statues of Jesus.

A Neolithic burial site built 1,000 years before Stonehenge.

This peaceful oasis appears dreamy, but it's also the site of a nightmarish legend.

The Egyptian-inspired last resting place of Lord Kilmorey.

This medieval church tower has maintained its clockworks since the 16th century.

This hospital helped pave the way for treatment that drove down child-mortality rates in 19th and 20th centuries.

A flourishing garden with pigs, donkeys, goats, rabbits, guinea pigs, chickens, ducks, and sheep.

The last resting place of the famous Native American princess is marked by a haunting monument.

This hidden garden boasts amazing views of Lyon.

The medieval network of canals hidden underneath the city is opened to explorers each year.

Ugly 18th-century dwarf statues living in a perfectly landscaped Austrian garden.

This strange statue features a bust of the famous composer plopped atop a woman's body.

Terrifically morbid cemetary and site of famous Paracelsus' grave.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

A small marionette collection located within the dark cellars of an 11th-century Austrian castle.

This 19th century cyclorama acts like an analogue time machine to a different era.

These 12th-century catacombs carved into a mountainside were a place of mysticism and Christian hermitages.