Tiny castle in the middle of the Rhine made you pay to pass.

A memorial for a young woman and her ghost, which are claimed to have caused countless deathly shipwrecks.

This "floating railway" is one of the world's oldest monorail systems.

This painted Lego bridge is the product of over a century of locomotive history.

The first recognized Neanderthal remains were found in this now-lost cave in 1856.

Centuries of warfare, tragedy, executions, and poetry come together in this 13th-century fortress.

This fountain of a little boy that spits on passersby at erratic intervals is a town icon.

Every half hour the eye-rolling clock face sticks out its tongue to mock the good citizens of Koblenz.

The final resting place for a wealthy Roman family, this tomb might be the best preserved of its kind outside Italy.

The highest cold-water geyser in the world.

How did a lighthouse wind up in the middle of this landlocked German city?

An elegant chandelier hangs over this ancient sewer chamber, now open for concerts and public tours.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

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.

A top-secret bunker now turned museum, is an eerie look at what life would have looked like in the event of nuclear war.

This mysterious pig iron pillar does not rust, despite being weathered by the elements for centuries.

A ruined castle stands atop a hill surrounded by dragon lore.