The world of the ancient Celtic civilization explained through a bewitching 11 acre garden.

A Nesting Doll of Churches.

Ancient Greek oracle of the dead.

Hideout of thieves, monks, and goat-footed gods.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

This legendary city has been a tourist attraction for centuries.

The hallucinogenic center of the ancient world.

A spectacular cave and a beguiling lake.

An alien landscape of chalk-rock in the Egyptian desert.

Brightly painted boulders scattered throughout the Sinai Desert.

A massive work of modern art that appears to be a crop circle in the middle of the desert.

This symbolic piece of New Orleans architecture is also home to a few ghastly stories.

A snapshot of the city's fascinating voodoo culture.

The final resting place of New Orleans' most famous voodoo priestess.

"X" marks the spot of an echo chamber in the middle of a plaza.

This haunting tombstone comes complete with a heartbreaking story of love and loss.

A 60-room castle constructed by a horse-racing heir.

This Rhode Island mansion was a stand-in for the exteriors of Collinwood in the original "Dark Shadows" series.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

England's oldest surviving hedge maze has been confusing visitors for over 300 years.

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

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

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.