A curious collection dedicated to human and animal anatomy and pathology.

This rare collection of human deformities displays fetuses with two faces, one eye, and "mermaid" legs.

This small museum is basically a time capsule of daily life in the Soviet Union.

Immortal combat in a Moscow museum.

This former insane asylum now holds a pathological anatomy museum.

The final resting place for the remains of 143 Habsburg royalty.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

The attic of a four-century-old canal house hides a clandestine church.

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

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

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

Once a state-of-the-art tuberculosis treatment spa, these ruins are now ruled by paintball players.

Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.

A Kyiv-based repository for all manners of discarded curiosities.

This unassuming museum's slogan translates to “there is a limit of sadness, anxiety has no limits."

A World War II evacuation tunnel turned into a history display of Croatian state and people.

Where the lovelorn find a home for their sentimental keepsakes.

Nature is slowly overtaking this disused cemetery on the outskirts of Brussels.

Medical history with an amazing, if frighting, collection of wax diseases on display.

Climb inside an iron crystal magnified 165 billion times its normal size.

The Devil’s own choice when he needs a drink in Brussels.

Macabre museum devoted to historical Viennese murders.

This recently restored crypt was once plagued by liquefying coffins and exploding caskets.