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

Beer lovers thirsty for knowledge can now visit a museum devoted to the world's largest hop-growing region.

Hidden in the forest are the crumbling, graffiti-covered remains of the factory where most of Germany's explosives were produced during World War II.

A two-inch thick solid brass rod that extends an astounding one kilometer straight into the earth.

World's largest barrel containing an inn.

These abandoned Cold War-era bunkers are now a designated refuge for endangered bat species.

Obscured within a ring of trees, this abandoned World War II relic hides on a German hillside.

This strategic isle was once swapped between empires and almost entirely destroyed in a bomb explosion.

These tenacious 14th-century towers defied demolition and are now a fairytale vacation rental.

A tilted half-timbered house from 1672 is built into a salvaged segment of a medieval wall.

Constructed by forced laborers, this submarine pen is now a museum and war memorial.

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

Now overgrown, these anti-tank barriers from World War II are sometimes called "dragon's teeth."

1898 German railroad depot museum with working engines, steam train excursions, and hands-on displays.

A steam powered train that runs on city streets.

Remnants of a cone-shaped Nazi bomb shelter.

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

Giant wind turbine with observation deck at the very top.

This dockworkers' lunch joint has been left leaning by a century of storm floods.

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

Böttcherstraße's bells, extolling Nordic virtues and the great conquerors of the world.

A geothermal energy project gone wrong is fracturing the city's picturesque architecture.

The bells remain in a shattered heap exactly as they fell when the church was bombed in World War II.

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