The one-time stronghold of the noble Douglas family, now home to ghost sightings and nesting birds.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

A church that bred legends, and served as an inspiration for the Da Vinci Code.

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

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

Spend the night in this formerly abandoned traditional Scottish village.

A 6th-century stone lies at the site of the mythical battle waged between King Arthur and his nemesis Mordred.

There is a strange little carving of a person seemingly crushed by a pillar behind the remains of St. Thomas Aquinas.

South Korea's love of the silly photograph is on full display at this goofy collection of trompe l'oeil paintings.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

On the Oregon coast there is a natural hole that seems to be draining the sea.

The last woman executed for witchcraft in Europe is remembered in this Swiss museum.

Staves, storm-calling, and of course, necropants.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

The oldest hotel in the world has been operated by the same family for over 1,300 years, even catering to samurai.

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

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

The oldest pub in Ireland may also be the oldest surviving bar in the entire world.

The world's largest collection of witchcraft regalia.

Since 1874, this macabre collection has developed into a museum devoted to Scotland Yard's mementos of dastardly deeds.

The sign at the garden gate reads: "These Plants Can Kill."

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

This ancient Irish religious site is covered in ancient carvings, many of which have barely aged.

A rocky Irish outcropping with a history of wealth, conflict, and ruin.