This elegant monument to those who fought against fascism is inspired by the shape of the poppy flower.

Space-age monument to an early 20th-century uprising.

The cross-shaped memorial is filled with kitschy tributes to the late pop star.

It's unclear what caused the fire that led to this opulent hotel's demise.

See how paper is made the old-fashioned way.

Depending on the region's rainfall, this church may be partially submerged.

Artists made this mosque into a marvel of Ottoman baroque architecture.

An eerie, derelict amusement park in Berlin.

This conical hill was built as a testing ground for an engineer known as the Glider King.

A statue of an astronomer gazes at the sky as a tribute to Caroline Herschel.

This platform is now a memorial dedicated to those who were deported during the Holocaust.

A unique Holocaust memorial tells the personal stories of the Jewish residents exiled from greater Berlin.

Started as a kitchen garden, now the second largest botanical garden in the world.

Home to 10,000 medical specimens including the remains of Rudolf Virchow's extensive collection of pathological specimens.

These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

One of the largest legal spray spots in Hamburg.

A wunderkammer of exoticism immortalized by Tom Waits.

Hidden in plain sight on a gable between two towers on the roof of shipping firm F. Laeisz' headquarter in Hamburg sits an unexpected bronze sculpture.

The place where World War I began.

This historic cemetery was inaccessible for several years due to dozens of land mines.

This ironic war memorial thumbs its nose at a campaign of inedible humanitarian aid food products.

This enormous abstract sculpture is part jungle gym, part elaborate noise-making machine.

The haunting ruins of a military fortress turned astronomical observatory sit on a Sarajevo mountaintop.

Inat Kuća, or "House of Spite," is more than just an oddly named restaurant.