The prototype for all Nazi concentration camps.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

This museum tells the story of lake dwellers from 4000 BC to 850 BC, replete with stilt houses and goats.

A remarkable two-country morph, this town is part of Germany legally but is by all other measures Swiss.

Albert Einstein's head sticks out of a snail shell stacked on a rocket in this truly bizarre monument to the scientist.

A striking 12th-century-style castle built on the edge of a cliff.

A meteorite-bounded town in Bavaria.

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

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

World's largest barrel containing an inn.

While you wait to cross the street at a traffic light in Mainz, you might notice that the light is staring back at you.

A famed artist's inspiring work of peace and tolerance.

A historic casino where Dostoyevsky is said to have lost it all on a single spin of the roulette wheel.

This tremendous timepiece was once the largest cuckoo clock in the world.

A rare water-powered funicular, it uses a huge tank of water and gravity to do its work.

Legendary site where an evil bishop was devoured by rodents.

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

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

Largest illuminated advertisement sign in the world.

The abandoned mine where American troops discovered a treasure trove of art and artifacts hidden by the Nazis.

One of the only spherical 19th century gas containers left today.