19th century pendulum and a clock restored by a rogue group of guerilla artists.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

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

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

Pompeii's less famous neighbor is still revealing her secrets.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

The site of London's first coffee house has been serving refreshments of one kind or another for 360 years.

An unassuming secret door once led to a legendary watering hole.

The yawning maw of this pagan visage is said to bite off the hands of liars.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

This small-town Connecticut restaurant gives each diner a free book from its vast library.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

A very classy 1920s-era bar right in Grand Central Station.

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

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

The 10,000 Torii shrine.

The "Seinfeld" diner.

Rebuilt remains of a temple to Roman god Mithras.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

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

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

This massive wooden building contains a giant Buddha, healing pillars, and tame deer wandering the grounds.