A glacial pothole was once a hideout for a notorious Scottish outlaw.

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

The last inhabitants of one of the U.K.'s most remote islands were evacuated in 1930.

A book bound in the skin of an infamous criminal, along with countless other specimens.

At high tide this strange footbridge appears to have no purpose whatsoever.

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

The elaborate clockwork contraptions in this Scottish gallery create small worlds of whimsy and horror.

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

This castle was established by the 4th Duke of Montrose and is connected to the Buchanan Clan.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

This series of Scottish caves has no clear purpose other than baffling historians.

Spend the night in this formerly abandoned traditional Scottish village.

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

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

360° views of the city plus five floors of optical illusions and hands-on science.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

A strange rock with a sinister reputation lurks within the crimson waters of this Scottish glen.

Near the former site of numerous witch burnings, this lavish Edinburgh mainstay pays homage to Scotland's brutal history.

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

These skilfully executed, poignant works of art dot a verdant Scottish dell.

These ruins witnessed the final gathering of the failed Jacobite Rebellion.

The Guinness Record holder for largest hedge in the world is a verdant Scottish bulwark.

Possibly the oldest living thing in Europe, more likely a pagan survivor.