A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

A 30-acre garden inspired by the principles of modern physics.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

The atmospheric road was never meant to be so creepy.

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

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

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

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

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

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

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

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

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

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

The site of an early Arthurian battle and the dwelling-place of prehistoric people and (possibly) an ancient race of giants.

The mysterious megaliths have enchanted and intrigued visitors for thousands of years.

A unique waterfall that some believe attracts the fairfolk.

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

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

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.