This Neapolitan exhibition hall grants weird and wonderful insight into the intricacies of human biology.

Skulls from the plague of 1656 and World War II bombings are united by a cult dedicated to caring for the ancient dead.

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

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

The burial place of an obscure North African saint was turned into a macabre body preservation factory for the 17th-century Neapolitan elite.

The Neapolitan Cult of the Dead still cares for the skulls at this mini-Fontanelle.

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

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

The mystery of this small, brick pond eluded its possibly only investigator until his death.

This Scottish bridge seems to compel dogs to leap to their death.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

These fantastically named natural pools look like something out of a Scottish myth.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

A showcase of canine neckwear spanning five centuries of doggie fashion and function.

This amazing trail among the many waterfalls around Ingleton has been enchanting visitors since 1885.

The site of a mysterious pony massacre is rich with extraterrestrial conspiracy theories.

Artists have long been drawn to these atmospheric 12th-century ruins.

These mysterious mazes carved on the rock may be up to 4,000 years old.

Inspired by a dream, a hermit carved out a home in this sandstone bank to live a life of contemplation and prayer.

This ruined folly was originally built to honor a failed American state that would have become "Westsylvania."

These unique stepping stones hug a river's edge to take hikers on a journey through a limestone gorge.

Don't be fooled by this fake medieval facade even if it is almost 300 years old.

This 2,000-year-old tree inspired the nursery rhyme "Rock-a-bye Baby."