Berliners converted a bombed-out, disused lot into a community-run urban farm with its own cafe and bar.

A museum in the building where Nazi Germany signed its surrender tells the story of World War II from the Soviet perspective.

A restaurant and observation deck built in a unique broadcasting antenna.

Floating swimming pool within a moored vessel.

A fascinating insight into daily life in the Eastern Bloc.

A wunderkammer of mysterious objects and stories.

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

A towering monument in Spain has proven to be more labor-intensive than initially planned.

Madrid's last horchata kiosk is a blue-and-white beacon of refreshment.

Abandoned for decades, trains still pass through the now-restored remains of one of Madrid's first metro stations.

Artist's eccentric property excessively decorated with found objects and work of his own.

The little tuxedo cat survived the trip, then languished in obscurity.

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

A curious collection of locks and keys.

Dolls of all shapes and sizes display the eras of femininity in this spooky and beautiful collection.

This Parisian gem is one of the most incredible ethnographic museums in the world.

A magical, macabre wax museum, beloved by locals, uses real artifacts to depict an assassination from the French Revolution.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

The headless bodies of more than 1,300 guillotined victims of the Reign of Terror are buried here in mass graves.

BDSM, 1930s Style.

Where the high court feasted, frolicked, and high courtesans put their royal lovers' diamonds to the test.

Natural history museum celebrating biodiversity with a parade of taxidermy animals.

A modern-day Lascaux cave underneath Paris.

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.