The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

Of course Salvador Dalí lived in a castle...

The tallest outdoor elevator in Europe rockets passengers on a dizzyingly precarious ride to the top of a mountain.

A student driver's nightmare.

The real life Hobbiton, this sheep farm has been forever transformed since being built for The Hobbit film series.

The world's only museum devoted to the wonders of fluorescence.

The ghostly remains of an accidental sea.

The legendary building that needed ghostly approval before being built.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

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

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

A church of bones, decorated with 40,000 human skeletons.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

An artsy hidden staircase leads to breathtaking views of San Francisco.

Rippling sand dunes frozen in the Arizona rock.

An exquisite tunnel of cascading flowers.

A surrealist timepiece by the artist of melting clocks.

Paris' linguistic guide to the international language of, yes, love.

This massive library holds what was once the largest book collection in the world.

Notorious artist squat renovated into legal studios.

One architect's organic, human-centric design has been fully realized in this alien art house.

Avant garde house of Pierre Cardin on the Cote d’Azur.

An eccentric artist's abode in this small Italian town has been transformed into a surreal temple of mosaic madness.

An open-air museum in a mountain valley features works designed to blend in with—and disintegrate back into—their natural surroundings.