The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

Millions of dollars worth of sculpture decorate this Iowa city center.

This zombie-themed restaurant stands out in the heart of corn country.

Two hundred tons of pioneer artifacts were painstakingly recovered from a shipwreck at the bottom of the Missouri River.

Oldest Museum of the Netherlands is a true cabinet of curiosities.

This unattributed sculpture in Amsterdam is hiding in plain sight.

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.

The Bloemen Route, or “Flower Route”, stretches 25 miles through prime Dutch tulip country as a result of “tulip mania,” the world’s first economic bubble.

A beautifully eclectic mix of architectural styles.

Amsterdam's Red Light District leaves little to the imagination.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

The patron saint of spinsters grasps a container of dried blood.

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

A small square plaque marks a failed assassination attempt that could have changed history.

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

The footprint of a frustrated devil in Munich's Cathedral.

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

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.