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

A historic steam train meanders along one of the most scenic rail routes in Germany's Black Forest.

A series of haunting wooden totems are hidden in the woods surrounding a German environmental center.

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

The largest mosque in Germany.

An elegant chandelier hangs over this ancient sewer chamber, now open for concerts and public tours.

Largest illuminated advertisement sign in the world.

This strange building looks like a medieval fortress crashed into a 1960s Brutalist office block.

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.

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

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

This temple to the sturm and drang of Richard Wagner contains a dragon's cave and reptile zoo full of living "dragons."

A ruined castle stands atop a hill surrounded by dragon lore.

This bakery and museum offers tours of the tastes and mythology of Aachen's signature spice biscuit—just don't ask for the recipe.

A distinctive former power plant turned university lecture hall looks like it could make you breakfast.

This mysterious pig iron pillar does not rust, despite being weathered by the elements for centuries.

World's only telecommunication tower with a wooden pinnacle.

The entrance to this Frankfurt subway station looks like an old tram car crashed into the concrete sidewalk.

From Nazi chemicals to the CIA, this architectural marvel has played a fascinating role in German history.

Flowers have mysteriously appeared on her effigy every day for the last 150 years.

This German art chapel is perfect for those who like their worship hard, modern, and utterly alien.

This former Nazi castle was built as a school to train what would have been the future of the Third Reich.

A top-secret bunker now turned museum, is an eerie look at what life would have looked like in the event of nuclear war.