A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

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

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

Northern Ireland's Brobdingnagian stepping stones.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

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

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

This South London cemetery holds the remains of more than 15,000 people.

Famously misunderstood wonder of the ancient world

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

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

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

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

This mysterious underground cave in Shropshire dates back to the 18th or 19th century.

The quiet field that inspired one of the most famous songs of all time.

19th century tunnels burrowed under Liverpool.

Pyramid shaped monument with a tall tale attached.

Charles Dickens described the concert room in this amazing Victorian hall as "the most perfect room in the world."

6000-year-old site covered in more than 50 megaliths.

This mysterious hilltop collection of Druid carvings isn't quite what it seems.

There's a strange stone hoodoo towering atop a wooded hillside and no one is quite sure how it got there.

Beasts and branches swirl in sandstone carvings, interrupted by one strange creature.

This romantic, decaying 13th-century ruin on the edge of Sherwood Forest is reputedly one of England's most haunted places.

The ancestral home of beloved English poet Lord Byron has a bizarre history.