This historic abandoned train station looks like a stop for ghost trains.

A remarkable cabinet of curiosities in an art space in the center of Berlin.

A sweet museum focused on beets.

Come stay at a live-in art installation.

A state-of-the-art medical facility from the Imperial era is now a derelict ruin.

The original burial place of this preeminent 18th-century Jewish philosopher was razed by the Nazis.

Berlin's beloved bear is immortalized at the Museum für Naturkunde.

The last remnants of a massive medieval wall that once encompassed the city of Berlin.

Known simply as "The Hand," this famous public sculpture in Berlin was featured in a Depeche Mode music video.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

This World War II bunker now survives as a documentation of the Nazi regime and war crimes.

A wunderkammer of mysterious objects and stories.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

A surreal museum of extraordinary industrial objects.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

A giant wooden soda bottle pays homage to a distinctly British drink on the very spot where it was invented.

The three colorful women depict characters from a beloved children's story.

A simple stone remembers one of the most menacing horses in the Swedish military.

A golden plaque marks the site of the mysterious unsolved assassination of the former Swedish prime minister.

The scars of a remarkably organized public protest to save 13 elm trees are still visible in this Stockholm park.

A plaque marks the house in Stockholm where the French philosopher René Descartes lived up until his death.

Although rarely used, there is still a hidden room for the royal family at the Stockholm central station.