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

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

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

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

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

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

Fountain where visitors can earn a license to be mad.

The giant skeleton sculpture is surprisingly well-traveled.

The world's largest "Christmas tree" is illuminated by hundreds of lights stretching 2,000 feet up the slope of Mount Ingino.

Does this church in Naples hold the true tomb of Vlad the Impaler, the notoriously cruel figure who inspired Bram Stoker's Dracula?

This 17th-century passageway is home to numerous bookshops, a witch legend, and the oldest pizzeria in the world.

A former Roman town that was once the home of Scipio Africanus.

San Gennaro, the patron saint of Naples, greets pedestrians between these narrow city streets.

The Neapolitan Cult of the Dead still cares for the skulls at this mini-Fontanelle.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

Destroyed numerous times, this centuries-old bridge has always been rebuilt with its original design.

A mocking tribute to the past and modern leadership of Prague.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

This automated sculpture of two men peeing will spell out text messages with their micturition.

An eerie, existential museum dedicated to the author of "The Metamorphosis."

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

What looks like a suicide in progress is actually a statue of Sigmund Freud.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

This hydrochronometer was invented by a Dominican monk and is a prime feature in this garden.