A Black Forest cuckoo clock theme park features one timepiece big enough to walk inside.

The prototype for all Nazi concentration camps.

Every hour the doors open to reenact the legend of the heroic mayor who saved his town by drinking a gallon of wine.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

The fairy tale castle of the "fairy-tale king."

When a medieval fire claimed the original St. Stephen’s Cathedral, it sparked a pattern of unquenchable organ building.

Baroque celebration of the end of the Great Plague of Vienna.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

A bit of retro transportation flair preserved in the world's largest department store.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

More than a million titles fill the labyrinthine shelves of this prestigious private library.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

This hidden green space is the city's second largest conservatory.

The final resting place to 300 Victorian-era pets hides inside the city park.

This university transit system is a 1970's vision of the future.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

This abstract roadside poultry was saved from demolition by outraged drivers and pilots.