London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

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

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

Collection dedicated to funeral rites, equipment, and mourning rituals of the Viennese.

The resting place for anonymous victims of the Danube's dark waters.

This Funeral Hearse Museum represents the finest in cadaver transportation.

18th century anatomical amphitheater of the Royal College of Surgery of Barcelona.

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

Turntable anonymously received orphans, alms, and groceries.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

This cemetery features modernist statues as strange as its name.

This semi-secret storybook hedge maze is also the oldest garden in the city.

A beautiful but toxic fountain of mercury.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

An exquisite Baroque church in Vienna's old town.

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

A marvel of technology a century ago, this disused power station now offers a lovely glimpse into the industrial design of the past.

This hidden art nouveau gem was designed by an architect in search of a national style.

A Hungarian optometrist's charming collection of Asian art and curiosities.

A Hungarian pharmacy museum with a box full of mummy powder.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

Perfume museum and library.

The only remaining collection of flayed figures made by French "madman" Honoré Fragonard.