This monument to those fallen in the World Wars is accompanied by a U-boat that Germany bought for a Deutsche Mark.

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

Once the longest swing bridge in Europe.

Model Trains and Much More in Hamburg.

Climb the dead electric pylons of Messina.

The world's most active stratovolcano is almost always erupting.

Explore the quarry where the marble was sourced for Michaelangelo's David.

A floating bridge leaning on barges allows pedestrians to reach the historical center.

The architect of this fanciful complex called it an "oasis for humanity and nature in a sea of rational houses."

This Dutch art piece became a Russian icon.

A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

This 11th-century castle sits so low you can't see it behind the surrounding buildings.

One of the Leiden's oldest pubs is also the birthplace of the Heineken star.

A giant bug impaled on a 75-foot-tall needle.

This whimsical statue dumps water on its head to symbolize knowledge flowing into his brain. Or maybe booze.

Italian cave with exceptional acoustics and an unsavory history.

A mysterious ancient elephant said to possess magic powers is now the symbol of a Sicilian city.

Be it nature, art, or abandoned military architecture this eclectic German "museum" has you covered.

Twisted buildings adorn the banks of the Rhine river.

This futuristic German television spire is actually the world's largest digital clock.

Where Venice's gondolas go for a tune-up.

Hitler's bleak vision of relaxation still stands as a mostly abandoned 10,000-room resort complex.

An elevator into the Baltic Sea.

The NASA scientists behind Apollo 11 started out developing Nazi weapons at this abandoned German rocket factory.