Rippling sand dunes frozen in the Arizona rock.

A psychedelic labyrinth on the San Francisco bay.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Containing a personal collection of more than 1,200 jugs from around the world.

France's high-tech, future-themed amusement park.

An uninhabited village that preserves and documents rural architecture and an endangered way of life.

This line of 12 tower mills described in the story of Don Quixote is among the most iconic landscapes in Spain.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

This century-old ruined temple was reborn as "The Church of Skate."

This influential Renaissance-era library was once the haunt of kings and monks.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

A huge cathedral single-handedly constructed by one eccentric monk.

Cliffside houses provide a spectacular view from their perch above the valley.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

12th-century holy complex shares land with a natural park full of heavenly waterfalls and raptors.

This medieval chapel is now a shrine to the region's favorite sport.

This miniature Paris, built out of trash, is one man's two decade labor of love.

Abandoned Nazi train station turned underground astroparticle laboratory.

A whimsical garden of outsider art in the Spanish countryside.

This Canadian hunting lodge is a long way from home.

Of course Salvador Dalí lived in a castle...

This magical space partly designed by Antoni Gaudi is one of the best examples of romantic gardening in the Mediterranean.