“And the Lord said unto Johan, build for thee an ark for the end of the world is approaching.”

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

A poignant mural honors the heroic teenage non-conformists who took on the Nazis and paid the ultimate price.

The largest mosque in Germany.

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

Residing along a busy thoroughfare, this sculpture urges passersby to consider the future.

If the tunes of antique organs and musical marionettes don't intoxicate you, the draft beer certainly will.

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.

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.

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 medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

The highest cold-water geyser in the world.

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.

A preserved college lock-up that recalls a clubhouse approach to discipline.

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

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.

A collection of artworks exclusively created by the mentally ill that was almost burned by Nazi culture police.

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

Visitors dating back to the 1600s carved their marks in the stones of the iconic tower.