Thousands of flamingos and other bird species flourish in these Camargue wetlands.

Now a memorial, this factory was once used as a concentration camp for artists by the Vichy government.

An intricate and amazing house built by architect Karl Junker.

A striking 12th-century-style castle built on the edge of a cliff.

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

Skeletons dressed in extravagant 18th century royal costumes cavort in the aisles of this German basilica.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

The oldest garden in Prague, once part of an medieval orchard.

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

An eerie, derelict amusement park in Berlin.

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

Most-visited and most-photographed slot canyon in the American Southwest.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

A crumbling hospital from the 1850s on Roosevelt Island.

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

World's first "penitentiary," meant to be humane, drove men insane.

On Japan's Tashirojima Island, cats are king.

A magical place that lets you play in and explore the world of Studio Ghibli.

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

This hidden garden boasts amazing views of Lyon.

Lyon's miniature version of the Eiffel Tower was built as a statement in support of French secularism.

This fascinating museum in an old water tower holds the world's largest collection of Vodou artifacts from western and central Africa.