The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

A 16th-century horror show built in a lovely Italian garden.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

World's largest barrel containing an inn.

The world's first and only three-segment bascule bridge folds up into the shape of a capital "N" to let boat traffic through.

A Neolithic burial site erected around 3000 BC.

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

A steam powered train that runs on city streets.

Giant wind turbine with observation deck at the very top.

The Suurhusen church tower in Germany leans over farther than the famous Leaning Tower of Pisa.

The only remaining U-boat that is still floating never actually saw any action in World War II.

The largest brick bridge in the world.

This German "living museum" is maybe a bit too immersive.

The many—66 to be exact—faces of the German forest.

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

One of the most well-known city festivals in the world.

From morgue to urn, watch the whole process at this unusual educational attraction.

Hamburg's first legal sex work is relegated to a gated street that still does not allow pedestrian women.

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

The only microgravity tower in Europe can produce nine seconds of weightlessness.

Thousands of flowers create enchanting pink tunnels over the city streets.

A preserved Nazi labor camp now has a Holocaust museum on site and memorials to the thousands that died while imprisoned at the camp.

A former Nazi lookout tower with a magnificent view of the Rhineland.

This wooden hotel is a temple to German sustainability and forest conservation.