This World War II bunker now survives as a documentation of the Nazi regime and war crimes.

Started as a kitchen garden, now the second largest botanical garden in the world.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

The last remnants of a massive medieval wall that once encompassed the city of Berlin.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

A unique bridge with an equally unique view.

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

A 200-year-old collection of medical paraphernalia in a historic house.

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

Horrifically creative torture devices and shame punishments line the walls of this chilling museum.

It's good luck to be mocked by this monkey.

This historic funicular system combines the old with the new while offering delightful views over the surrounding valley.

This Nazi-built amphitheater was constructed on a sacred mountain site used by various German cults.

A local museum honors the history of Bamberg’s unique cultural heritage: growing crops in the heart of the city.

A beautiful collection of taxidermy birds and rare pomological wax models.

Art historians have debated the identity of this medieval stone rider since the 19th century.

A former smuggler's haven houses "The Chapel" and its mysterious carvings.

A sculpture for the sun and stars, created by Nancy Holt.

This lighthouse has been guiding shipping into the Golden Gate since before the American Civil War.

This cabin once belonged to one of California's original settlers.

Murder, searching for gold, and being cut in half—the memorial statue of Daniel O. McCarthy and the Pioneers of '49

This historic roadhouse has many tales to tell of San Francisco's early history.

A newspaper building that made radio history.

This lonesome Monterey cypress has survived centuries of wind, salt, and at least one attempt at arson.